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function setup() {
createCanvas(windowWidth, windowHeight);
background(0);
noStroke();
rectMode(CENTER);
for (i = 0; i < 100; i++) {
fill(random(127, 255), random(0, 127), random(0, 127), 127);
rect(random(width), random(height), random(10, 200), random(10, 200));
}
}