/* built with Studio Sketchpad: 
 *   https://sketchpad.cc
 * 
 * observe the evolution of this sketch: 
 *   https://dflab.sketchpad.cc/sp/pad/view/ro.QVvjuzIjEdy/rev.141
 * 
 * authors: 
 *   Teresa Castro
 *   

 * license (unless otherwise specified): 
 *   creative commons attribution-share alike 3.0 license.
 *   https://creativecommons.org/licenses/by-sa/3.0/ 
 */ 



// Variável para gurdar o tempo em que a ultima frame foi desenhada
long last_update = 0;
 
// Variável para gurdar o tempo da animação
long anim_time = 0;
 
// tempo total de animação
long max_anim_time = 1000;
 
void setup() {  
    size(300, 300); 
 
    background(0);
 
    // a função millis() dá-nos o tempo em milissegundos desde
    // que o sketch começou;
    last_update = millis();
} 
 
void draw() {
    background(0);
    
    // tempo actual
    long now = millis();
 
    // tempo desde a ultima frame
    long delta = millis() - last_update;
    
    last_update = now;
    
    // objecto que pulsa a cada 2 segundos
    anim_time = (anim_time + delta) % max_anim_time;
    
    fill(10,200,200)
    ellipse (width/2, height/2, anim_time / 20, anim_time / 20);
      fill(100,200,200)
    ellipse (width/4, height/4, anim_time / 20, anim_time / 20);
      fill(100,200,200)
    ellipse (width/2, height/4, anim_time / 20, anim_time / 20);
      fill(100,200,200)
    ellipse (width/4, height/2, anim_time / 20, anim_time / 20);
      fill(100,200,200)
    ellipse (width/1, height/2, anim_time / 20, anim_time / 20);
      fill(100,200,200)
    ellipse (width/1, height/4, anim_time / 20, anim_time / 20);
      
    fill(100,200,200)
    ellipse (width/50, height/60, anim_time / 20, anim_time / 20);
    fill(100,200,200)
    ellipse (width/1, height/1, anim_time / 20, anim_time / 20);
    fill(100,200,200)
    ellipse (width/300, height/300, anim_time / 20, anim_time / 20);

}