diff --git a/license.txt b/license.txt
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--- /dev/null
+++ b/license.txt
@@ -0,0 +1,661 @@
+                    GNU AFFERO GENERAL PUBLIC LICENSE
+                       Version 3, 19 November 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
+  The GNU Affero General Public License is a free, copyleft license for
+software and other kinds of works, specifically designed to ensure
+cooperation with the community in the case of network server software.
+
+  The licenses for most software and other practical works are designed
+to take away your freedom to share and change the works.  By contrast,
+our General Public Licenses are intended to guarantee your freedom to
+share and change all versions of a program--to make sure it remains free
+software for all its users.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
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+
+  Developers that use our General Public Licenses protect your rights
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+  A secondary benefit of defending all users' freedom is that
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+The GNU General Public License permits making a modified version and
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+code of the modified version.
+
+  An older license, called the Affero General Public License and
+published by Affero, was designed to accomplish similar goals.  This is
+a different license, not a version of the Affero GPL, but Affero has
+released a new version of the Affero GPL which permits relicensing under
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+
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+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If your software can interact with users remotely through a computer
+network, you should also make sure that it provides a way for users to
+get its source.  For example, if your program is a web application, its
+interface could display a "Source" link that leads users to an archive
+of the code.  There are many ways you could offer source, and different
+solutions will be better for different programs; see section 13 for the
+specific requirements.
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU AGPL, see
+<https://www.gnu.org/licenses/>.
diff --git a/public/about/.gitignore b/public/about/.gitignore
new file mode 100644
index 0000000..0b84df0
--- /dev/null
+++ b/public/about/.gitignore
@@ -0,0 +1 @@
+*.html
\ No newline at end of file
diff --git a/public/js/library.js b/public/js/library.js
index 711341f..ded1781 100644
--- a/public/js/library.js
+++ b/public/js/library.js
@@ -1,4 +1,25 @@
 "use strict";
+/**
+ *
+ * @source http://tilde.club/~chmod777/ts/base.ts
+ *
+ * @license AGPL-3.0-only
+ * @licstart
+ * Copyright (c) 2021 chmod777
+ *
+ * This program is free software: you can redistribute it and/or modify it under
+ * the terms of the GNU Affero General Public License as published by the Free
+ * Software Foundation, either version 3 of the License.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * @licend
+ */
 let pong;
 window.onload = function () {
     pong = new Pong(document);
@@ -48,6 +69,27 @@ function getSVGPathElement(svgDocument, id) {
         return element;
     throw error(id, 'svg path');
 }
+/**
+ *
+ * @source http://tilde.club/~chmod777/ts/pong.ts
+ *
+ * @license AGPL-3.0-only
+ * @licstart
+ * Copyright (c) 2021 chmod777
+ *
+ * This program is free software: you can redistribute it and/or modify it under
+ * the terms of the GNU Affero General Public License as published by the Free
+ * Software Foundation, either version 3 of the License.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * @licend
+ */
 class Vec2 {
     constructor(x, y) {
         this.x = x;
@@ -119,6 +161,11 @@ class Line {
         const q_minus_p = q.sub(p);
         if (r_cross_s === 0) {
             return null;
+            // let q_minus_p_cross_r = q_minus_p.cross(r);
+            // if (q_minus_p_cross_r === 0)
+            //     return null; // collinear
+            // else
+            //     return null; // parallel
         }
         else {
             const t = q_minus_p.cross(s.div(r_cross_s));
@@ -130,7 +177,7 @@ class Line {
                     return p.add(r.mul(t));
             }
             else {
-                return null;
+                return null; // divergent
             }
         }
     }
@@ -465,6 +512,14 @@ class Pong {
         }
     }
 }
+/*
+  x          w
+y +---------------------+
+  |          |          |
+h |          0          |
+  |          |          |
+  +---------------------+
+*/
 Pong.WIDTH = 512;
 Pong.HEIGHT = 256;
 Pong.HALF_WIDTH = Pong.WIDTH / 2;
@@ -484,35 +539,56 @@ Pong.PADDLE_STARTING_POSITION_Y = Pong.CENTER.y - Pong.PADDLE_HALF_HEIGHT;
 Pong.PLAYER_STARTING_POSITION = new Vec2(0, Pong.PADDLE_STARTING_POSITION_Y);
 Pong.AI_STARTING_POSITION = new Vec2(Pong.WIDTH - Pong.PADDLE_WIDTH, Pong.PADDLE_STARTING_POSITION_Y);
 Pong.RAW_CORNERS = [
+    // top left
     new Vec2(0, 0 + Pong.BALL_RADIUS),
+    // top right
     new Vec2(Pong.WIDTH, 0 + Pong.BALL_RADIUS),
+    // bottom right
     new Vec2(Pong.WIDTH, Pong.HEIGHT - Pong.BALL_RADIUS),
+    // bottom left
     new Vec2(0, Pong.HEIGHT - Pong.BALL_RADIUS)
 ];
 Pong.BOARD_CORNERS = [
+    // top left
     new Vec2(Pong.RAW_CORNERS[0].x - Pong.BALL_RADIUS, Pong.RAW_CORNERS[0].y),
+    // top right
     new Vec2(Pong.RAW_CORNERS[1].x + Pong.BALL_RADIUS, Pong.RAW_CORNERS[1].y),
+    // bottom right
     new Vec2(Pong.RAW_CORNERS[2].x + Pong.BALL_RADIUS, Pong.RAW_CORNERS[2].y),
+    // bottom left
     new Vec2(Pong.RAW_CORNERS[3].x - Pong.BALL_RADIUS, Pong.RAW_CORNERS[3].y)
 ];
 Pong.PADDLE_COLLISION_CORNERS = [
+    // top left
     new Vec2(Pong.RAW_CORNERS[0].x + Pong.PADDLE_WIDTH + Pong.BALL_RADIUS, Pong.RAW_CORNERS[0].y),
+    // top right
     new Vec2((Pong.RAW_CORNERS[1].x - Pong.PADDLE_WIDTH) - Pong.BALL_RADIUS, Pong.RAW_CORNERS[1].y),
+    // bottom right
     new Vec2((Pong.RAW_CORNERS[2].x - Pong.PADDLE_WIDTH) - Pong.BALL_RADIUS, Pong.RAW_CORNERS[2].y),
+    // bottom left
     new Vec2(Pong.RAW_CORNERS[3].x + Pong.PADDLE_WIDTH + Pong.BALL_RADIUS, Pong.RAW_CORNERS[3].y)
 ];
 Pong.BOARD_BOUNDS = [
+    // top
     [new Line(Pong.BOARD_CORNERS[0], Pong.BOARD_CORNERS[1]), false],
+    // left
     [new Line(Pong.BOARD_CORNERS[0], Pong.BOARD_CORNERS[3]), true],
+    // bottom
     [new Line(Pong.BOARD_CORNERS[3], Pong.BOARD_CORNERS[2]), false],
+    // right
     [new Line(Pong.BOARD_CORNERS[1], Pong.BOARD_CORNERS[2]), true]
 ];
 Pong.PADDLE_COLLISION_BOUNDS = [
+    // top
     [new Line(Pong.PADDLE_COLLISION_CORNERS[0], Pong.PADDLE_COLLISION_CORNERS[1]), false],
+    // left
     [new Line(Pong.PADDLE_COLLISION_CORNERS[0], Pong.PADDLE_COLLISION_CORNERS[3]), true],
+    // bottom
     [new Line(Pong.PADDLE_COLLISION_CORNERS[3], Pong.PADDLE_COLLISION_CORNERS[2]), false],
+    // right
     [new Line(Pong.PADDLE_COLLISION_CORNERS[1], Pong.PADDLE_COLLISION_CORNERS[2]), true]
 ];
+// generate random number in range(-1, 1)
 function genRandom() {
     return (Math.random() - 0.5) * 2;
 }
diff --git a/public/js/library.js.map b/public/js/library.js.map
index 9aa3b9a..1fe464f 100644
--- a/public/js/library.js.map
+++ b/public/js/library.js.map
@@ -1 +1 @@
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\ No newline at end of file
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\ No newline at end of file
diff --git a/public/js/main.js b/public/js/themes.js
similarity index 66%
rename from public/js/main.js
rename to public/js/themes.js
index 9c3d1dd..18670c9 100644
--- a/public/js/main.js
+++ b/public/js/themes.js
@@ -1,3 +1,25 @@
+/**
+ * 
+ * @source http://tilde.club/~chmod777/js/themes.js
+ * 
+ * @license AGPL-3.0-only
+ * @licstart
+ * Copyright (c) 2021 chmod777
+ *
+ * This program is free software: you can redistribute it and/or modify it under
+ * the terms of the GNU Affero General Public License as published by the Free
+ * Software Foundation, either version 3 of the License.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * @licend
+ */
+
 const color_theme_id = "color-theme";
 const font_id = "fonts";
 
diff --git a/public/ts/.gitignore b/public/ts/.gitignore
new file mode 100644
index 0000000..b0a155e
--- /dev/null
+++ b/public/ts/.gitignore
@@ -0,0 +1 @@
+*.ts
\ No newline at end of file
diff --git a/src/main.rs b/src/main.rs
index 188e59b..2989b79 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -104,6 +104,11 @@ fn append_str(base: &str, extend: &str) -> String {
 	s
 }
 fn main() {
+	{
+		fs::copy("ts/src/base.ts", "public/ts/base.ts").unwrap();
+		fs::copy("ts/src/pong.ts", "public/ts/pong.ts").unwrap();
+	}
+
 	{
 		let svg_tera = match Tera::new("svg_templates/**/*") {
 			Ok(tera) => tera,
@@ -161,6 +166,19 @@ fn main() {
 	)
 	.unwrap();
 
+	{
+		context.title = "About JavaScript".to_owned();
+		context.canonical_url =
+			"http://tilde.club/~chmod777/about/javascript.html".to_owned();
+		let blog_context = Context::from_serialize(&context).unwrap();
+		tera.render_to(
+			"javascript.html",
+			&blog_context,
+			get_file("public/about/javascript.html"),
+		)
+		.unwrap();
+	}
+
 	{
 		context.title = "chmod777's blog".to_owned();
 		context.canonical_url =
diff --git a/svg_templates/macros.xml b/svg_templates/macros.xml
index 07821a8..c092487 100644
--- a/svg_templates/macros.xml
+++ b/svg_templates/macros.xml
@@ -6,11 +6,11 @@
 	<rdf:RDF>
 		<cc:Work rdf:about="http://tilde.club/~chmod777/svg/chat-bubbles-icon.svg">
 			<dc:format>image/svg+xml</dc:format>
-
+			<dc:type rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+			
 			<dc:creator>chmod777</dc:creator>
 			<dc:title>{{ title | safe }}</dc:title>
 			<dc:description>{{ description | safe }}</dc:description>
-			<dc:type rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
 			
 			<cc:license rdf:resource="http://creativecommons.org/licenses/by-nc-sa/4.0/" />
 		</cc:Work>
diff --git a/templates/base_head_inner.html b/templates/base_head_inner.html
index 58d5460..b0bec1f 100644
--- a/templates/base_head_inner.html
+++ b/templates/base_head_inner.html
@@ -1,23 +1,23 @@
-	<meta charset="utf-8">
-	<title>{{ title | safe }}</title>
-	<meta name="description" content="{{ description | safe }}">
-	<meta name="author" content="chmod777">
-	<meta name="viewport" content="width=device-width, initial-scale=1.0">
+<meta charset="utf-8">
+<title>{{ title | safe }}</title>
+<meta name="description" content="{{ description | safe }}">
+<meta name="author" content="chmod777">
+<meta name="viewport" content="width=device-width, initial-scale=1.0">
 
-	<meta property="og:type" context="{{ og_type | safe }}">
-	<meta property="og:title" context="{{ title | safe }}">
-	<meta property="og:description" context="{{ description | safe }}">
-	<meta property="og:url" context="{{ canonical_url | safe }}">
-	<meta property="og:image" context="{{ page_image | safe }}">
-	<meta property="og:local" context="{{ og_locale | safe }}">
-	<meta property="og:site_name" context="{{ og_site_name | safe }}">
+<meta property="og:type" context="{{ og_type | safe }}">
+<meta property="og:title" context="{{ title | safe }}">
+<meta property="og:description" context="{{ description | safe }}">
+<meta property="og:url" context="{{ canonical_url | safe }}">
+<meta property="og:image" context="{{ page_image | safe }}">
+<meta property="og:local" context="{{ og_locale | safe }}">
+<meta property="og:site_name" context="{{ og_site_name | safe }}">
 
-	<meta property="twitter:card" context="{{ twitter_card | safe }}">
-	<meta property="twitter:title" context="{{ title | safe }}">
-	<meta property="twitter:description" context="{{ description | safe }}">
-	<meta property="twitter:url" context="{{ canonical_url | safe }}">
-	<meta property="twitter:image" context="{{ page_image | safe }}">
+<meta property="twitter:card" context="{{ twitter_card | safe }}">
+<meta property="twitter:title" context="{{ title | safe }}">
+<meta property="twitter:description" context="{{ description | safe }}">
+<meta property="twitter:url" context="{{ canonical_url | safe }}">
+<meta property="twitter:image" context="{{ page_image | safe }}">
 
-	<link rel="canonical" href="{{ canonical_url | safe }}">
-	<link rel="stylesheet" href="/css/styles.css">
-	<script src="/assets/js/main.js"></script>
\ No newline at end of file
+<link rel="canonical" href="{{ canonical_url | safe }}">
+<link rel="stylesheet" href="/css/styles.css">
+<script src="/js/themes.js"></script>
\ No newline at end of file
diff --git a/templates/footer.html b/templates/footer.html
index 1389248..2a86410 100644
--- a/templates/footer.html
+++ b/templates/footer.html
@@ -3,4 +3,11 @@
 	<br>
 	<br>
 	<a class="link-padding" id="page-source" target="_blank" href="https://tildegit.org/chmod777/my_blog">page source (tildegit in new tab)</a>
+	<br>
+	<br>
+	<p>The contents of this site unless otherwise denoted are licensed under</p>
+	<a href="https://creativecommons.org/licenses/by-nc-sa/4.0/legalcode">Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)</a>
+	<br>
+	<br>
+	<a href="/about/javascript" rel="jslicense">JavaScript license information</a>
 </footer>
\ No newline at end of file
diff --git a/templates/javascript.html b/templates/javascript.html
new file mode 100644
index 0000000..49da8f5
--- /dev/null
+++ b/templates/javascript.html
@@ -0,0 +1,43 @@
+<!doctype html>
+
+<html lang="en">
+<head>
+	<meta charset="utf-8">
+	<title>About JavaScript</title>
+	<meta name="description" content="">
+	<meta name="author" content="chmod777">
+	<meta name="viewport" content="width=device-width, initial-scale=1.0">
+
+	<link rel="canonical" href="http://tilde.club/chmod777/about/javascript.html">
+</head>
+
+<body class="dark-theme monospace-font" onload="first_load()">
+	<nav>
+		<a href="/">chmod777's homepage</a>
+	</nav>
+
+	<main>
+		<table id="jslicense-labels1">
+			<tr>
+				<th>JavaScript</th>
+				<th>License</th>
+				<th>Source</th>
+			</tr>
+			<tr>
+				<td><a href="/js/library.js">library.js</a></td>
+				<td><a href="http://www.gnu.org/licenses/agpl-3.0.html">AGPL-v3-only</a></td>
+				<td>
+					<a href="/ts/base.ts">base.ts</a>
+					<a href="/ts/pong.ts">pong.ts</a>
+				</td>
+			</tr>
+			<tr>
+				<td><a href="/js/themes.js">themes.js</a></td>
+				<td><a href="http://www.gnu.org/licenses/agpl-3.0.html">AGPL-v3-only</a></td>
+			</tr>
+		</table>
+	</main>
+
+	{% include "footer.html" %}
+</body>
+</html>
diff --git a/templates/theme_options.html b/templates/theme_options.html
index ba81515..78218c3 100644
--- a/templates/theme_options.html
+++ b/templates/theme_options.html
@@ -1,31 +1,27 @@
-	<form>
-		<fieldset>
-			<legend aria-describedby="about-theme-options">Theme Options</legend>
-			<p id="about-theme-options">theme options requires javascript</p>
-			<script>
-				const id = "about-theme-options";
-				const element = document.getElementById(id);
-				element.innerHTML = element.innerHTML.concat(" (javascript enabled)");
-			</script>
+<form>
+	<fieldset>
+		<legend aria-describedby="about-theme-options">Theme Options</legend>
+		<p id="about-theme-options">theme options requires javascript</p>
+		<script>
+			// @license magnet:?xt=urn:btih:0b31508aeb0634b347b8270c7bee4d411b5d4109&dn=agpl-3.0.txt AGPL-v3-only
+			const id = "about-theme-options";
+			const element = document.getElementById(id);
+			element.innerHTML = element.innerHTML.concat(" (javascript enabled)");
+			// @license-end
+		</script>
 
-			<label id="color-theme-label" for="color-theme">color theme</label>
-			<select id="color-theme" name="color-theme">
-				<option value="dark-theme">dark (default)</option>
-				<option value="classic-theme">classic</option>
-				<!--
-				<option value="high-contrast-theme">high contrast</option>
-				-->
-			</select>
+		<label id="color-theme-label" for="color-theme">color theme</label>
+		<select id="color-theme" name="color-theme">
+			<option value="dark-theme">dark (default)</option>
+			<option value="classic-theme">classic</option>
+		</select>
 
-			<label id="fonts-label" for="fonts">fonts</label>
-			<select id="fonts" name="fonts">
-				<option value="monospace-font">monospace (default)</option>
-				<option value="default-font">browser default</option>
-				<!--
-				<option value="comic-sans-font">Comic Sans</option>
-				-->
-			</select>
+		<label id="fonts-label" for="fonts">fonts</label>
+		<select id="fonts" name="fonts">
+			<option value="monospace-font">monospace (default)</option>
+			<option value="default-font">browser default</option>
+		</select>
 
-			<input type="button" value="apply settings" onclick="apply_theme_options()">
-		</fieldset>
-	</form>
\ No newline at end of file
+		<input type="button" value="apply settings" onclick="apply_theme_options()">
+	</fieldset>
+</form>
\ No newline at end of file
diff --git a/ts/src/base.ts b/ts/src/base.ts
index 6a1baa0..d0c8d31 100644
--- a/ts/src/base.ts
+++ b/ts/src/base.ts
@@ -1,3 +1,25 @@
+/**
+ * 
+ * @source http://tilde.club/~chmod777/ts/base.ts
+ * 
+ * @license AGPL-3.0-only
+ * @licstart
+ * Copyright (c) 2021 chmod777
+ * 
+ * This program is free software: you can redistribute it and/or modify it under
+ * the terms of the GNU Affero General Public License as published by the Free
+ * Software Foundation, either version 3 of the License.
+ * 
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
+ * details.
+ * 
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * @licend
+ */
+
 let pong;
 window.onload = function() {
     pong = new Pong(document);
diff --git a/ts/src/pong.ts b/ts/src/pong.ts
index 89f1689..bdbf287 100644
--- a/ts/src/pong.ts
+++ b/ts/src/pong.ts
@@ -1,3 +1,25 @@
+/**
+ * 
+ * @source http://tilde.club/~chmod777/ts/pong.ts
+ * 
+ * @license AGPL-3.0-only
+ * @licstart
+ * Copyright (c) 2021 chmod777
+ * 
+ * This program is free software: you can redistribute it and/or modify it under
+ * the terms of the GNU Affero General Public License as published by the Free
+ * Software Foundation, either version 3 of the License.
+ * 
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
+ * details.
+ * 
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * @licend
+ */
+
 class Vec2 {
 	constructor(public x: number, public y: number) {}
 
diff --git a/ts/tsconfig.json b/ts/tsconfig.json
index 61194c0..c4a3802 100644
--- a/ts/tsconfig.json
+++ b/ts/tsconfig.json
@@ -19,7 +19,7 @@
 		"noImplicitThis": true,
 		"noUnusedLocals": true,
 		"noUnusedParameters": true,
-		"removeComments": true,
+		"removeComments": false,
 
 		"strict": true,
 		"strictNullChecks": true,