import turtle as tt

def example_01():
    """Pentagono invertido"""
    tt.bgcolor("black")
    tt.color("white")
    tt.speed(1)
    tt.setundobuffer(None)
    for _ in range(5):
        tt.forward(100)
        tt.right(72)
    tt.exitonclick()

if __name__ == "__main__":
    example_01()