​

function setup(){

  createCanvas(windowWidth,windowHeight);

  for(let i = 0; i < 10; i++){

    // make some random x, y points and put them in an array

    let x = random(width);

    let y = random(height);

​

    // each iteration store x and y in an array within circles

    circles.push([x,y])

  }

}

​

function draw() {

  background(0)

  for(let i = 0; i < circles.length; i++){

    circle(circles[i][0], circles[i][1], 30)

  }

}