Nested For Loop Example

sketch.js

function setup() {
  createCanvas(windowWidth, windowHeight); 
}

function draw() {

  background(0);
  noFill();
  stroke(255);
  
  for (var x = 0; x < width; x+=5) {
    for (var y = 0; y < height; y+=5) {
        rect(x, y, 2, 2);
    }
  }


}