霓虹燈

function setup() {

  createCanvas(windowWidth, windowHeight);

  background(0);

}

​

function draw() {

  // ellipse(mouseX, mouseY, 20, 20);

  colorMode(HSB);

  for(let i = 0 ; i < width ; i+=50){

    let h = map(i , 0 , width , 0 , 360);

    for(let circle = 0 ; circle < height ; circle+=50){

      fill((h+ circle + frameCount *5 )/2%360,mouseY/5 , mouseX/5);

      ellipse(i, circle, 20);

    }

  }

}