let randomnessSeed

function setup() {
  randomnessSeed = random(100)
}

function draw() {
  const size = 50
  randomSeed(randomnessSeed)
  createCanvas(windowWidth, windowHeight);
  background(255)
  noStroke()
  for(let i = 0; i <= innerWidth; i += size){
    for(let j = 0; j <= innerWidth; j += size){
      colorMode(HSL)
      fill(random(180) + mouseX / windowWidth * random(90) + mouseY / windowHeight * random(90),
        keyIsPressed ? 0 : 100,
        random(50) + mouseX / windowWidth * 25 + mouseY / windowHeight * 25
      )
      let randomsize = 0
      do {
        randomsize = randomGaussian(size / 20) * 20
      }
      while (randomsize >= size  + size / 10 || randomsize < size / 10)
      circle(i, j, randomsize / 2 + mouseY / windowHeight * 50)
    }
  }
}