/* built with Studio Sketchpad: 
 *   https://sketchpad.cc
 * 
 * observe the evolution of this sketch: 
 *   https://studio.sketchpad.cc/sp/pad/view/ro.Th-BS$nfpTI/rev.719
 * 
 * authors: 
 *   
 *   
 *   
 *   
 *   
 *   
 *   scudly
 *   

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



// Pressing Control-R will render this sketch.

float starttime = ((((((
    year()-2000)*12+month())*31+day())
    *24+hour())*60)+minute())*60+second();

int n = 257; 

void setup() {
    
    // canvas size (Variable aren't evaluated. Integers only, please.)
    size(600, 600);
    background(0);
      
    // smooth edges
    smooth();
    
    // limit the number of frames per second
    frameRate(30);
    
    noStroke();
} 

void draw() {

    // clear the background
    fill(0, 64);
    rect(0, 0, width, height);

    float time = starttime + millis()*0.001;
    //text( time, 10, height-10 );

    translate(width/2, height/2);
    for( int i=1; i<=n; ++i ) {
        float s = float(i)/n;
        fill( 255 * (1.0 - s), 255 * s, 255 );
        float t_i = time * s;
        float r = (1.0 + sin(t_i*1.618034)) * width/5 + width/20;
        //r = s * width/2.5 + width/20;
        float a = t_i - 0.5*time;
        ellipse( r*cos(a), r*sin(a), 5, 5 );
    }
    
}