class ColorSquare {
  float xpos, ypos, squareSize;
  float xspeed, yspeed;
  color c;
  
  ColorSquare(float xpos_, float ypos_, float squareSize_, color c_) {
    xpos = xpos_;
    ypos = ypos_;
    c = c_;
    xspeed = random(-2, 2);
    yspeed = random(-2, 2);
    squareSize = squareSize_;
  }
  
  void render() {
    noStroke();
    fill(c);
    rectMode(CENTER);
    rect(xpos, ypos, squareSize, squareSize);
  }
  
  void update() {
    xpos += xspeed;
    ypos += yspeed;
    if (xpos > width || xpos < 0) {
      xspeed *= -1;
    }
    if (ypos > height || ypos < 0) {
      yspeed *= -1;
    }
  }
  
}