/* built with Studio Sketchpad: 
 *   https://sketchpad.cc
 * 
 * observe the evolution of this sketch: 
 *   https://studio.sketchpad.cc/sp/pad/view/ro.lfAXs$osOVI/rev.504
 * 
 * authors: 
 *   zack marlow

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



float radius = 50;
void setup(){
    size(800,600);
}
    
    
void draw(){
    background(0);
    drawCircles(width/2,height/2);
}
        
void drawCircles(float cx, float cy){
    float t = frameCount*.01;
    for(int r = radius; r < width/2; r+= radius){
        for(int theta = 0; theta < PI*2; theta += PI/8){
            float x,y;
            x = cx+cos(theta+t)*r;
            y = cy+sin(theta+t)*r;
            noStroke();
            fill(255,0,0);
            ellipse(x,y,4,4);
            fill(255);
            text("(" + (String)((int)x) + " , " + (String)((int)y)+ ")",x,y);
        }
    }
}