//import processing.opengl.*;
color comp = color(255, 255, 192);
Shape s1, s2, s3, s4;

void setup()
{
  //size(640,480,OPENGL);
  size(640,480);
  
  s1 = new Shape(100, 100);
  s2 = new Shape(540, 100);
  s3 = new Shape(100, 380);
  s4 = new Shape(540, 380);
}

void draw()
{
  background(255);
  draw_circle();
  draw_shapes();
}

void draw_circle()
{
  noStroke();
  fill(comp);
  ellipse(mouseX, mouseY, 100, 100);
  framerate(60);
}

void draw_shapes()
{
  s1.be();
  s2.be();
  s3.be();
  s4.be();
}


class Shape
{
  float x,y,s;
  boolean sel = false;
  color f = color(0, 0, 192);
  float a = 0;
  
  Shape(float $x, float $y)
  {
    x = $x; y = $y;
    s = 20;
    a = random(TWO_PI);
  }
  
  void be()
  {
    move();
    listen();
    draw();
  }
  
  void move()
  {
    x += cos(a)*.5;
    y += sin(a)*.5;
    wrap();
  }
  
  void wrap()
  {
    if (x < 0-s) { x = width+s; } else
    if (y < 0-s) { y = height+s; } else
    if (x > width+s) { x = 0-s; } else
    if (y > height+s) { y = 0-s; }
  }
  
  void draw()
  {
    if (sel) {
      fill(f);
    } else {
      fill(192);
    }

    ellipse(x, y, s, s);
  }
  
  void listen()
  {
    //color c = get((int)x, round(height-y));
    color c = get((int)x, (int)y);
    if (red(c) == red(comp) &&
        green(c) == green(comp) &&
        //blue(c) == blue(comp)+1) {
        blue(c) == blue(comp)) {
       sel = true;
    } else {
      sel = false;   
    }
  }
}