rainbow2

function setup() {

  createCanvas(windowWidth, windowHeight);

  background(0);

  frameRate(5);

}

​

function draw() {

  colorMode(HSB, 360,100,100);

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

  { 

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

    var sa

    stroke(col,100,100);

    line(i,0,i, height);

  push();

  translate(width/2,height/2);

  rotate(radians(col) );

  rectMode(CENTER);

  noFill();

  rect(0,0,col,col);

  pop();

}

}