glitch

PImage img;
int counter;
int scal = 10;
float noiseVal;

void setup() {
  img = loadImage("http://media-cache-ak0.pinimg.com/736x/8f/16/7a/8f167a7272c88412a7c9b5ee00fd8ae7.jpg");
  size(500, img.height);
  //image(img, 0, 0);
  frameRate(5);
  noiseVal = random(100);
}

void draw() {
  background(0);
  int step =  int(random(1*scal, 2*scal));

  for (int y=0; y<height; y+=step) {
    //int x = int(random(-1, 1)*20);
    int x = (int) (noise(noiseVal)*width/2);
    noiseVal += 0.01;
    println();
    copy(img, 0, y, width, step, x, y, width+x, step);
    copy(img, width-x, y, x, step, 0, y, x, step);
  }
}