This sketch is created with an older version of Processing,
and doesn't work on browsers anymore.
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void setup (){
size (800,600);
background (0);
}
void draw(){
}
void mousePressed() {
for (int r=0; r<800; r=r+10){
noStroke();
fill(mouseY,20,mouseX);
rectMode(CENTER);
rect(mouseX+r,mouseY,25,25);}
}
//void keyPressed () {
//saveFrame ("dibu-####.png");}