Random Lines

sketch.js

var x;
var y;
var r;
var g;
var b;

function setup() {
  createCanvas(400,400);
  y = 0;
  r = random(255);
  g = random(255);
  b = random(255);
}

function draw() {
  background(r%255,g%255,b%255);
  r+=1;
  g+=1;
  b+=1;
  strokeWeight(5);
  line(width/2, height/2, 0, y);
  line(width/2, height/2, width, y);

  y++;
  
}