/* built with Studio Sketchpad: 
 *   https://sketchpad.cc
 * 
 * observe the evolution of this sketch: 
 *   https://studio.sketchpad.cc/sp/pad/view/ro.KcoTvxJHq-R/rev.7
 * 
 * authors: 
 *   (Unnamed author)

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



// This sketch builds on a prior work, "Untitled Sketch", created by an unnamed author
// http://sketchpad.cc/sp/pad/view/ro.3t9ecEWeTZP/rev.704


int a=0;
int fl=0;
int t=0;
float easing = 0.1;
int addCirc = 1;
int[] d = new int[15];
float[] x = new float[15];
float[] y = new float[15];
int[] tr = new int[15];

void setup() {
  size(1000, 400);
  smooth(); 
  noStroke();
  frameRate(30);  
}

void draw() {
  background(0);
  if (fl==0)
  {
      fl=1;
      for (int a = 0;a<=30;a+=1)
      {
           //diameter
           d[a]=int(random(30,100));
           //x
           x[a]=int(random(d[a]/2,width-d[a]/2));
           //y
           y[a]=int(random(d[a]/2,height-d[a]/2));
           //transparancy
           tr[a]=int(random(0,254));
           
       } 
  }

  for (int a = 0;a<=30;a+=1)
  {
    if  ((mouseX!=0) && (mouseY!=0)){
        targetX = mouseX;  
        float dx = mouseX - x[a];  
        if(abs(dx) > 1) {  
            x[a] += dx * easing;  
        }  
    
        targetY = mouseY;  
        float dy = mouseY - y[a];  
        if(abs(dy) > 1) {  
          y[a] += dy * easing;  
        }  
     }
     fill(255,0,0,tr[a]);     
     ellipse(x[a],y[a],d[a],d[a]);

  }
  dx=0;
  for (int a=1;a<=30;a+=1)
  {
      dx=dx+abs(x[a-1]-x[a]);
  }
  if (dx<100){ fl=0; }
  
  t+=1;
  if (t%addCirc==0)
  {
     theCirc=int(random(0,14));
     //diameter
     d[theCirc]=int(random(30,100));
     //x
     x[theCirc]=int(random(d[theCirc]/2,width-d[theCirc]/2));
     //y
     y[theCirc]=int(random(d[theCirc]/2,height-d[theCirc]/2));
     //transparancy
     tr[theCirc]=int(random(0,254));
     t=0;
  }

}