OSD for WASD, space, and shift for Sinarun (or similarly controlled games)

sinarun.py

from ctypes import *
import pygame

res = (620, 400)
keySize = (100, 100)
keyMargin = 20
spaceSize = (res[0] - keyMargin * 2, 100)
backgroundColor = (0, 0, 0)
activeColor = (255, 255, 255)
deactiveColor = (128, 128, 128)

keysToCheck = [
    {
        "name": "W",
        "rect": pygame.Rect(
            (
                (res[0] - keySize[0])/2, #top
                keyMargin                #left
            ),keySize),                  #size
        "keyCode": 0x57
    },
    {
        "name": "A",
        "rect": pygame.Rect(
            (
                (res[0] - keySize[0])/2 - keySize[0] - keyMargin,
                keySize[1] + keyMargin * 2
            ),keySize),
        "keyCode": 0x41
    },
    {
        "name": "S",
        "rect": pygame.Rect(
            (
                (res[0] - keySize[0])/2,
                keySize[1] + keyMargin * 2
            ),keySize),
        "keyCode": 0x53
    },
    {
        "name": "D",
        "rect": pygame.Rect(
            (
                (res[0] - keySize[0])/2 + keySize[0] + keyMargin,
                keySize[1] + keyMargin * 2
            ),keySize),
        "keyCode": 0x44
    },
    {
        "name": "Space",
        "rect": pygame.Rect(
            (
                (res[0] - spaceSize[0])/2,
                keySize[1] * 2 + keyMargin * 3 + 20
            ),spaceSize),
        "keyCode": 0x20
    },
    {
        "name": "Shift",
        "rect": pygame.Rect(
            (
                (res[0] - keySize[0])/2 - (keySize[0] + keyMargin) * 2,
                keySize[1] + keyMargin * 2
            ),keySize),
        "keyCode": 0xA0
    }
]

# http://stackoverflow.com/questions/2591483/getting-a-specific-bit-value-in-a-byte-string
def getBit(byteval, idx):
    return ((byteval & (1 << idx)) != 0)

def isKeyDown(key):
    return (getBit(windll.user32.GetKeyState(key), 8))

if __name__ == "__main__":
    pygame.init()
    screen = pygame.display.set_mode(res)
    clock = pygame.time.Clock()
    quitOSD = False
    while not quitOSD:
        for e in pygame.event.get():
            if e.type == pygame.QUIT:
                quitOSD = True
        screen.fill((0, 0, 0))
        for keyT in keysToCheck:
            if isKeyDown(keyT["keyCode"]):
                color = activeColor
            else:
                color = deactiveColor
            pygame.draw.rect(screen, color, keyT["rect"])
        pygame.display.flip()
        clock.tick(30)
    pygame.quit()