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var x = 0
var y = 0
function setup() {
createCanvas(400, 400);
}
function draw() {
background(0);
noStroke()
for (var x = 0; x <= width; x += 50) {
for (var y = 0; y <= height; y += 50) {
fill (random(255), 0, random(255));
ellipse(x, y, 25, 25);
}
}
}