import arcade
arcade.open_window(600, 600, "test")
arcade.set_background_color(arcade.color.WHITE)
arcade.start_render()
arcade.draw_rectangle_filled(200, 200, 300, 300, (0,0,255,255))

# thought you should be able to see the rectangle above through this rectangle
arcade.draw_rectangle_filled(150, 150, 300, 300, (0,255,0,127))
arcade.finish_render()
arcade.run()