PImage pic;
int[] pixelArray;
boolean run;
boolean mouseDown;

void setup() {
  size(600,400);
  frameRate(30);
  background(0,0,0);
  smooth();
  //amelie.jpg, cac.jpg, food.jpg, night.jpg, lime.jpg, toronto.jpg,vaneyck.jpg
  pic = loadImage("src/cac.jpg");
  pixelArray = new int[width*height];
  for (int i=0; i <width*height; i++) {
   pixelArray[i] = pic.pixels[i]; 
  }
  run = true;
  mouseDown = false;
  
}

void draw() {
  //turn on of off
  if (mousePressed) {
    if (mouseDown == false) {
      mouseDown = true;
      run = !run;
    }
  }else{
    mouseDown = false; 
  }
 //draw image
 if (run == true) {
   makeImage();
 }
 //save image
 if (keyPressed) {
  if (key == 'S') {
   String time = "savedImages/savedimage-"+month()+day()+year()+"_"+hour()+minute()+second()+"_"+millis()+".png";
   //save(time);
  } 
 }
}

void makeImage() {
   int x = round(random(0,width));
   int y = round(random(0,height));
   color pix = pic.get(x,y);
   stroke(pix);
   int count = 0;
   //loop thought image pixels:
   for (int w=0; w <width; w++) {
     for (int h=0; h<height; h++) {
       color a = pic.get(x,y);
       color b = pic.get(w,h);
       if (a == b) {
         noFill();
         ellipse(x,y,4,4);
         stroke(a,25);
         line(x,y,w,h);
         count++;
       }
     }
   }
   //draw center circle
   stroke(pix,255);
   ellipse(x,y,count,count);
}