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function setup() {
createCanvas(windowWidth, windowHeight);
noStroke();
for (let i = 0; i < 1000; i++) {
let x = random(width);
let y = random(height);
let diameter = random(100);
fill(random(0, 256), random(0,130), random(100,200), random(170));
ellipse(x, y, diameter, diameter );
}
}