while let Some(e) = window.next() {
    window.draw_2d(&e, |c, g, d| {

      fn drawFPS<G>(
        &c: &Context,
        glyphs: Glyphs,
        &fps: &isize,
        g: &mut Graphics<Texture>
      ){
        let transform = c.transform.trans(10.0, 100.0);
        text::Text::new_color([0.0, 1.0, 0.0, 1.0], 32).draw(
          format!("FPS {}", fps).as_str(),
          &mut glyphs,
          &c.draw_state,
          transform,
          g
        ).unwrap();
      }
      let fps = counter.tick();
    });
  };