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function setup() {
createCanvas(windowWidth, windowHeight);
background(100);
}
function draw() {
r = random(255)
g = random(255)
b = random(255)
if(mouseIsPressed) {
fill(r,g,b)
ellipse(mouseX, mouseY, 20, 20);
}else{
rect(mouseX, mouseY, 20, 20)
}
}