       left:           40
       top:            220
       angle:          90
-      fill:           'rgba(255,0,0,0.5)'
       selectable:     true
       tank_direction: 1
       tank_turn_cnt:  0

      left:           600
      top:            240
      angle:          270
      fill:           'rgba(0,255,0,0.5)'
      selectable:     false
      tank_direction: 3
      tank_turn_cnt:  0

  keyboard =
    tank1_left:  false

    else if bullet.intersectsWithObject tank2
      remove_bullet bullet
      kill_tank tank2
    else
      canvas.forEachObject (obj) ->
        if obj isnt bullet and obj.intersectsWithObject bullet
          remove_bullet bullet
          return

  fire_bullet = (tank) ->
    pos = switch tank.angle
