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function setup() {
createCanvas(400, 400);
background(230);
fill(0);
let yPos = 0;
let xPos = 0;
for (yPos = 30; yPos < height; yPos=yPos + 40) {
for (xPos = 20; xPos<width; xPos=xPos + 40) {
circle(xPos,yPos, 5);
}
}
}