renderer.ex

  def brush_for(:ell),   do: [255, 150, 0, 255]
  def brush_for(:jay),   do: [12, 0, 255, 255]
  def brush_for(:ess),   do: [5, 231, 5, 255]
  def brush_for(:zee),   do: [255, 17, 17, 255]
  def brush_for(:bar),   do: [0, 240, 255, 255]
  def brush_for(:oh),    do: [247, 255, 17, 255]
  def brush_for(:tee),   do: [100, 255, 17, 255]
  def brush_for(:board), do: [0, 0, 0, 255]

  def set_brush(renderer, brush_type), when: is_list(brush_type) do
    :ok = apply(:sdl_renderer, :set_draw_color, [renderer] + brush_for(brush_type))
  end
  def set_brush(renderer, brush_type), when: is_atom(brush_type) do
    set_brush(renderer, brush_for(brush_type))
  end