Rainbow Map

function setup() {

  createCanvas(windowWidth, windowHeight);

  background(0);

​

}

​

function draw() {

  //background(0);

  colorMode(HSB, 360, 100, 100);

  //if (mouseIsPressed)

  for (i=0; i<width; i++)

  {

    var col = map(i, 0, width, 0, 360);

    stroke(col, 100, 100);

    line(i, 0, i, height);

  }

  translate(width/2, height/2);

  rotate(radians(col) );

  rectMode(CENTER);

  noFill();

  rect(0, 0, col, col);

}