Simple pygame screenhack

#!/usr/local/bin/python2.7

import pygame
import math

pygame.init()

Width = 1920 - 2
Height = 1080 - 24
mid_x = Width / 2
mid_y = Height / 2
radius = min(mid_x,mid_y)

Black = (0,0,0)
White = (255,255,255)
Green = (0,255,0)

screen = pygame.display.set_mode((Width, Height))
screen.fill(White)

pygame.draw.line(screen, Black, (mid_x, 0), (mid_x, Height))
pygame.draw.line(screen, Black, (0, mid_y), (Width, mid_y))

pygame.display.update()

for angle in range(0,360):
    phi = math.radians(angle)
    x = math.sin(phi)
    y = math.cos(phi)
    xx = mid_x + (x * radius)
    yy = mid_y - (y * radius)
    pygame.draw.line(screen, Green, (mid_x, mid_y), (xx, yy))
    pygame.display.update()


while 1:
    event = pygame.event.poll()

    if event.type == pygame.MOUSEBUTTONDOWN:
        pygame.quit()
        sys.exit()