function drawCanvasContent(){
  createCanvas(windowWidth, windowHeight)
  background(255)
  for (let i = 0; i <= 50; i++) {
    fill(0, 0, 0, 0)
    square(random(width/2), random(height/2), random(width/8, width/2))
  }
}

function setup() {
  drawCanvasContent();
}

function mouseMoved() {
  drawCanvasContent();
}