mario problem from stackoverflow

import pygame, sys #import pygame modules
from pygame.locals import *
import time, random

Clock = pygame.time.Clock()

def main():

    black=(0,0,0)
    white=(255,255,255)
    green=(0,255,0)
    red=(255,0,0)
    blue=(0,0,255)


    pygame.init()

    screen=pygame.display.set_mode((1080,500),0,32)

    bif='ScrollingBack - Copy.jpg' # set variable=image in same directory
    mif='mario.png' # set variable = image in same directory
    grif='ground500.png'
    jif='mariojump.png'
    hif='mariohalfjump.png'
    soundChannel = pygame.mixer.Channel(0)
    font = pygame.font.Font(None,20)
    clock = pygame.time.Clock()
    framerate = 30
    rate = 200 / framerate



    background=pygame.image.load(bif).convert() # load and convert image in directory, set = background
    ground=pygame.image.load(grif).convert_alpha()
    mario=pygame.image.load(mif).convert_alpha()
    mariojump=pygame.image.load(jif).convert_alpha()
    mariohalfjump=pygame.image.load(hif).convert_alpha()

    x,y=0,0
    movex,movey=-.1 * rate,0
    gx,gy=0,0
    movegx,movegy=0,0
    mx,my=180,447
    movemx,movemy=0,0

    while 1:

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

                if event.type==KEYDOWN:
                    if event.key==K_RIGHT or event.key==K_d:
                        if mx==450:
                            movex=-.4 * rate
                            movegx=-1.5 * rate
                            movemx=1 * rate
                        else:
                            movemx=1 * rate

                    elif event.key==K_LEFT or event.key==K_a:
                        movex=.4 * rate
                        movegx=1.5 * rate
                        movemx=-1 * rate

                    elif event.key==K_UP or event.key==K_w or event.key==K_SPACE:
                        if my==447:
                            movemy=-1.8 * rate


                if event.type==KEYUP:
                    if event.key==K_RIGHT or event.key==K_d:
                        movex=-.1 * rate
                        movegx=0
                        movemx=0

                    if event.key==K_LEFT or event.key==K_a:
                        movex=-.1 * rate
                        movegx=0
                        movemx=0

                    elif event.key==K_UP or event.key==K_w or event.key==K_SPACE:
                        movemy=1 * rate



        if x>-5:
            x=-5
            gx=-5



        if x > 1:
            x = 0
        if mx>450:
            mx=450
        if mx<180:
            mx=180

        if movex<-.4 * rate:
            movex=-.4 * rate
        if movex>.4 * rate:
            movex=.4 * rate

        x+=movex
        y+=movey


        if movegx<-1.5 * rate:
            movegx=-1.5 * rate
        if movegx>1.5 * rate:
            movegx=1.5 * rate

        gx+=movegx
        gy+=movegy

        mx+=movemx
        my+=movemy

        if my>447:
            my=447

        if my<250:
            movemy=1 * rate









        screen.blit(background,(x,y))
        screen.blit(ground,(gx,gy))
        if my>415 and my<447:
            screen.blit(mariohalfjump,(mx,my))
        if my<415:
            screen.blit(mariojump,(mx,my))
        elif my==447:
            screen.blit(background,(x,y))
            screen.blit(ground,(gx,gy))
            screen.blit(mario,(mx,my))
            #pygame.display.update()



        screen.blit(font.render(str(movex),True,(255,255,255)),(5,5))
        pygame.display.update()
        clock.tick(framerate)

        if gx<-13900:
            time.sleep(.5)
            main()

main()