diff --git a/src/img/screenshot_uxn-tiles-2bpp.png b/src/img/screenshot_uxn-tiles-2bpp.png
index 0551756..932eedc 100644
Binary files a/src/img/screenshot_uxn-tiles-2bpp.png and b/src/img/screenshot_uxn-tiles-2bpp.png differ
diff --git a/src/uxn_tutorial_day_2.gmo b/src/uxn_tutorial_day_2.gmo
index d456bc5..ac563f4 100644
--- a/src/uxn_tutorial_day_2.gmo
+++ b/src/uxn_tutorial_day_2.gmo
@@ -930,40 +930,40 @@ the low nibble will allow us to choose between many combinations of colors assig
 
 + <table>
 + <tr><th>low nibble</th><th>color for state 0</th><th>color for state 1</th><th>color for state 2</th><th>color for state 3</th></tr>
-+ <tr><td>0</td><td>clear</td><td>clear</td><td>clear</td><td>clear</td></tr>
++ <tr><td>0</td><td>0</td><td>0</td><td>1</td><td>2</td></tr>
 + <tr><td>1</td><td>0</td><td>1</td><td>2</td><td>3</td></tr>
-+ <tr><td>2</td><td>0</td><td>2</td><td>0</td><td>2</td></tr>
-+ <tr><td>3</td><td>0</td><td>2</td><td>0</td><td>2</td></tr>
-+ <tr><td>4</td><td>1</td><td>1</td><td>1</td><td>1</td></tr>
-+ <tr><td>5</td><td>1</td><td>2</td><td>3</td><td>0</td></tr>
-+ <tr><td>6</td><td>1</td><td>3</td><td>1</td><td>3</td></tr>
-+ <tr><td>7</td><td>1</td><td>0</td><td>3</td><td>2</td></tr>
-+ <tr><td>8</td><td>2</td><td>2</td><td>2</td><td>2</td></tr>
-+ <tr><td>9</td><td>2</td><td>3</td><td>0</td><td>1</td></tr>
-+ <tr><td>a</td><td>2</td><td>0</td><td>2</td><td>0</td></tr>
-+ <tr><td>b</td><td>2</td><td>1</td><td>0</td><td>3</td></tr>
-+ <tr><td>c</td><td>3</td><td>3</td><td>3</td><td>3</td></tr>
-+ <tr><td>d</td><td>3</td><td>0</td><td>1</td><td>2</td></tr>
-+ <tr><td>e</td><td>3</td><td>1</td><td>3</td><td>1</td></tr>
-+ <tr><td>f</td><td>3</td><td>2</td><td>1</td><td>0</td></tr>
++ <tr><td>2</td><td>0</td><td>2</td><td>3</td><td>1</td></tr>
++ <tr><td>3</td><td>0</td><td>3</td><td>1</td><td>2</td></tr>
++ <tr><td>4</td><td>1</td><td>0</td><td>1</td><td>2</td></tr>
++ <tr><td>5</td><td>none</td><td>1</td><td>2</td><td>3</td></tr>
++ <tr><td>6</td><td>1</td><td>2</td><td>3</td><td>1</td></tr>
++ <tr><td>7</td><td>1</td><td>3</td><td>1</td><td>2</td></tr>
++ <tr><td>8</td><td>2</td><td>0</td><td>1</td><td>2</td></tr>
++ <tr><td>9</td><td>2</td><td>1</td><td>2</td><td>3</td></tr>
++ <tr><td>a</td><td>none</td><td>2</td><td>3</td><td>1</td></tr>
++ <tr><td>b</td><td>2</td><td>3</td><td>1</td><td>2</td></tr>
++ <tr><td>c</td><td>3</td><td>0</td><td>1</td><td>2</td></tr>
++ <tr><td>d</td><td>3</td><td>1</td><td>2</td><td>3</td></tr>
++ <tr><td>e</td><td>3</td><td>2</td><td>3</td><td>1</td></tr>
++ <tr><td>f</td><td>none</td><td>3</td><td>1</td><td>2</td></tr>
 + </table>
 
-& * 0: clear
+& * 0: colors 0, 0, 1, 2
 & * 1: colors 0, 1, 2, 3
-& * 2: colors 0, 2, 0, 2
-& * 3: colors 0, 3, 2, 1
-& * 4: colors 1, 1, 1, 1
-& * 5: colors 1, 2, 3, 0
-& * 6: colors 1, 3, 1, 3
-& * 7: colors 1, 0, 3, 2
-& * 8: colors 2, 2, 2, 2
-& * 9: colors 2, 3, 0, 1
-& * a: colors 2, 0, 2, 0
-& * b: colors 2, 1, 0, 3
-& * c: colors 3, 3, 3, 3
-& * d: colors 3, 0, 1, 2
-& * e: colors 3, 1, 3, 1
-& * f: colors 3, 2, 1, 0
+& * 2: colors 0, 2, 3, 1
+& * 3: colors 0, 3, 1, 2
+& * 4: colors 1, 0, 1, 2
+& * 5: colors none, 1, 2, 3
+& * 6: colors 1, 2, 3, 1
+& * 7: colors 1, 3, 1, 2
+& * 8: colors 2, 0, 1, 2
+& * 9: colors 2, 1, 2, 3
+& * a: colors none, 2, 3, 1
+& * b: colors 2, 3, 1, 2
+& * c: colors 3, 0, 1, 2
+& * d: colors 3, 1, 2, 3
+& * e: colors 3, 2, 3, 1
+& * f: colors none, 3, 1, 2
 
 ## hello new sprites!