added retro() command

README.md

@@ -69,6 +69,11 @@ Alternatively, a RGB color or RGBA color with transparency can be specified, wit
 penSize(n)
 ```
 Width of pen in pixels
+
+```
+retro()
+```
+Adds a retro filter on the entire drawing. This command can be called anywhere and filter is always applied at the end of the program.
 		       
 ### Randomness
 
@@ -136,3 +141,4 @@ forward(100);
 
 - Re-render turtle() after screen resizing
 - Added new setpos(x,y) function to move turtle to a position. A path will be drawn if the pen is currently down.
+- add retro() command for retro filter. 

lib/plogo.js

@@ -2,12 +2,14 @@ let angle,
 	x,
 	y,
 	drawing = true,
+	retroStyle = false,
 	turtleC;
 function setup() {
 	createCanvas(windowWidth, windowHeight); //canvas is size of window
 	resetDefaults();
 	turtle();
 	displayTurtle();
+	retroFilter();
 }
 
 function resetDefaults() {
@@ -80,6 +82,16 @@ function randint(max = 100) {
 	//default returns int between 0 and 100
 	return int(random(max));
 }
+function retro() {
+	retroStyle = true;
+}
+function retroFilter() {
+	if (retroStyle) {
+		//attempts a 'retro' aesthetic
+		filter(THRESHOLD);
+		filter(BLUR, 3);
+	}
+}
 function displayTurtle() {
 	stroke(0, 255, 0);
 	strokeWeight(1);