/**
Mesmerizing spirals by <a href="http://www.local-guru.net/">guru</a>
*/
void setup() {
  size(300,300);
  smooth();
  frameRate(25);
}

float a = 0;

void draw() {
  a += 0.01;
  background(0);
   noStroke();
   pushMatrix();
   translate( width/2, height/2 );
   rotate(a);
   fill(0, 255, 0, 128 );
   ellipse( 0,0, 10, 10);   
   for( int i = 0; i < 360; i += 10 ) {
       for( int j = 0; j < 360; j += 15 ) {
         ellipse( cos(radians(i + j)) * i, sin(radians(i + j)) * i, 10, 10);
       }
   }
   popMatrix();
   pushMatrix();
   translate( width/2, height/2 );
   rotate( 0.8 * a );
   fill(255, 255, 0, 128 );
   ellipse( 0,0, 10, 10);   
   for( int i = 0; i < 360; i += 10 ) {
       for( int j = 0; j < 360; j += 15 ) {
         ellipse(cos(radians(i + j)) * i, sin(radians(i + j)) * i, 10, 10);
       }
   }
   popMatrix();
   
}