int i = 0;
  //int j = 0;
  int o = 255;
  int p = 0;
  float yPos = 0.0;
void setup() 
{
  size(800, 800);
  background(0);
  framerate(20);
}

void draw() { 
  fill(0,5);
  rect(0, 0, width, height);
  stroke(o, 0, p);
  if(i<=400){
  beginShape(LINE_LOOP);
  vertex(330+i, 320+i/2);
  vertex(385+i, 320-i/3);
  vertex(385-i, 375-i/5);
  vertex(330-i, 375-i/2);
  endShape();
  o=o-5;
  p=p+5;
  i=i+10;}
  //i=(mouseX / 2); 
  //j=(mouseY / 2);
  if(i>=400){
  o=255;
  p=0;
  i=10;
  }
}