2B Loops

let j = 200

let k = 200 

let l = 200

​

function setup() {

  createCanvas(windowWidth, windowHeight);

  background(100);

  noStroke()

}

​

function draw() {

  j = 100 + mouseX/width*200

  k = 100 + mouseY/height*200

  for (x = 0; x < width; x+=j){

    for(y = 0; y < height; y+=k){

      for(z=0; z< j; z+=5){

        fill(x/width*255,y/height*255,(mouseX+mouseY)/(width+height)*255,z/j*255)

        push()

        translate(x,y)

        rotate((mouseX+mouseY)/(width+height)*TWO_PI)

        rect(0,0,j-z,k-z)

        pop()

      }

    }

  }

}