class Blip {
  // color
  color shade;
  // vertical position on screen
  float position;
  // width
  float size;
  
  Blip( color c, float p, float s ) {
    shade = c;
    position = p;
    size = s;
  }
  
  void draw() {
    fill( shade );
    rect( width/2, position, size, 10 );
  }
}