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function setup() {
createCanvas(800, 600);
background(random(0,255));
noStroke();
fill (random(0,255),random(0,255),random(0,255),random(0,100));
for(let i=0;i<100;i++){
ellipse(random(0,800),random(0,600),random(1,100),random(1,100));
rect(random(200,600),random(150,450),random(1,50),random(1,50))
}
}