Nyan Parade with Gradient!

float circleY;

float circleX;

float Yvel=1;

float Xvel=1;

​

void setup(){

  size(500,500);

  smooth();

  background(255);

}

​

void draw(){

  for (int j=0; j<height; j++){

      stroke(255,map(j,0,height,0,255),0);

      //point(i,j);

      line(0,j,width,j);

    }

  circleY=circleY+Yvel;

  circleX=circleX+Xvel;

  PImage rastanyan = loadImage("rastanyan.png");

  image(rastanyan,circleX+340,circleY-20);

  PImage americanyan = loadImage("americanyan.png");

  image(americanyan,circleX+250,circleY-20);

  PImage mexicannyan = loadImage("mexicannyan.png");

  image(mexicannyan,circleX+140,circleY-20);

  PImage metalnyan = loadImage("metalnyan.png");

  image(metalnyan,circleX+60,circleY-20);

  PImage nyan = loadImage("nyan.png");

  image(nyan,circleX-20,circleY-20);

    if((circleY<0)||(circleY>height)){

    Yvel=Yvel*-1;

  }

  if((circleX<0)||(circleX>width)){

    Xvel=Xvel*-1;

  }

}  

​

​