<iframe width='500px' height='400px' src='https://nest.ktbyte.com/nest#801' allowfullscreen></iframe>

PImage nyan;
PImage rainbow;
int nyanX;
int nyanY;
int nyanYSpeed;

int[] starXs;
int[] starYs;
int numStars;

// runs at the beginning
void setup() {
  size(1500, 500);
  nyan = loadImage("http://www.nyan.cat/cats/original.gif");
  rainbow = loadImage("http://i.imgur.com/BeeOhQV.png");

  nyanX = 0;
  nyanY = 0;
  nyanYSpeed = 1;

  numStars = 10;
  starXs = new int[numStars];
  starYs = new int[numStars];

  for(int i = 0; i < numStars; i++) {
    starXs[i] = (int)random(0, width);
    starYs[i] = (int)random(0, height);
  }
}

// runs 60 times a second
void draw() {
  background(20, 20, 100);
  // ellipse(x, y, w, h); 
  // frameCount
  for(int j = 0; j < starXs.length; j++) {
    ellipse(starXs[j], starYs[j], (frameCount + 10 * j) % 50, (frameCount + 10 * j) % 50);
  }
  image(nyan, nyanX, nyanY); // PImage, x, y
  for(int i = 1; i <= 3; i++) {
    image(rainbow, nyanX - 300 * i, nyanY);
  }
  nyanX += 4;
  if(nyanX > width) {
    nyanX = -300;
  }
  nyanY += nyanYSpeed;
  if(nyanY > 300 || nyanY < 0) {
    nyanYSpeed = -nyanYSpeed;
  }

}