PyGame Flying Animation in Python

PyGame_Flying_SuperTux_Animation.py

'''
Created on 16-Nov-2014

@author: Psycho_Coder
'''

import random
import sys

import pygame
from pygame.locals import QUIT


def main():
    pygame.init()

    size = width, height = 650, 450

    DISPSURF = pygame.display.set_mode( size, 0 , 32 )
    pygame.display.set_caption( "Simple Animation - 1" )

    FPS = 30
    fps_timer = pygame.time.Clock()

    img = pygame.image.load( 'supertux.gif' )
    startx, starty = 40, height / 2

    while True:
        DISPSURF.blit( pygame.image.load( 'city.png' ), ( 0, 0 ) )
        ch = get_direction()

        if ch == "R":
            startx += 5
            if startx == ( width - 20 ):
                ch = get_direction()
        elif ch == "L":
            startx -= 5
            if startx == 20:
                ch = get_direction()
        elif ch == "T":
            starty -= 5
            if starty == 20:
                ch = get_direction()
        elif ch == "B":
            starty += 5
            if starty == ( height - 20 ):
                ch = get_direction()

        DISPSURF.blit( img, ( startx, starty ) )

        for evt in pygame.event.get():
            if evt.type == QUIT:
                pygame.quit()
                sys.exit()


        pygame.display.update()
        fps_timer.tick( FPS )


def get_direction():
    direction = ["R", "L", "T", "B" ]
    return direction[ random.randint( 0, 3 ) ]


if __name__ == "__main__":
    main()