​

function setup() {

  createCanvas(600, 400);

}

​

function draw() {

  background(20);

  stroke(255);

  strokeWeight(2);

  for (var colr = 0; colr < 255; colr = colr + 1) { //what's wrong with this session?

    fill(colr, 255, 255);

  }

  console.log (colr);

  for (var x = 0; x <= width; x += 50) {

    ellipse(x + offset, 200, 30, 30);

  }

  offset = offset + 1;

}