(x,y,t,&r,&g,&b){
   
   a = t / 10;
   z = 20 * (1.2 + cos(t));
        
   dx = z * cos(a);
   dy = z * sin(a);
   
   ix = x - dy * y + dx * x;
   iy = y + dx * y + dy * x;

   pic(ix, -iy, r, g, b);
}