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function setup() {
createCanvas(windowWidth, windowHeight);
background(0);
noStroke();
for (i = 0; i < 1000; i++) {
let x = random(width);
let y = random(height);
let diameter = random(y/10.0);
fill(random(0, 127), random(0, 255), random(127, 255), 127);
ellipse(x, y, diameter, diameter);
}
}