import random
import sys
import pygame
from pygame.locals import *
 
def genera_matrix(posx,posy):
    font = pygame.font.Font(None,20)
    cadena = "abcdefghijklmnopkrstuvwxyz1234567890!#$%&/()=?*[]_:;"
    posicion = []
    while 1:
        pygame.event.pump()
        keyinput = pygame.key.get_pressed()
        if keyinput[K_ESCAPE] or pygame.event.peek(QUIT):
            sys.exit(2)
        if posx not in posicion:
            car = random.randrange(len(cadena))
            green = random.randrange(50,75)
            text = font.render(cadena[car],1,(32,green,32))
            screen.blit(text,(posx,posy))
            if (posy >= 0 and posy <= SCREEN_HEIGHT):
                posy = posy + 12
 
            if posy >= SCREEN_HEIGHT:
                posicion = posicion + [posx]
                posx = random.randrange(SCREEN_WIDTH)
                posy = random.randrange(SCREEN_HEIGHT)
            screen.blit(text,(posx,posy))
            pygame.display.flip()
            pygame.time.wait(100)
        else:
            posx = random.randrange(SCREEN_WIDTH)
            posy = random.randrange(SCREEN_HEIGHT)
 
def genera_binario():
    font = pygame.font.Font(None,16)
    posx_ini = 0
    posy_ini = 0
 
    posx_fin = SCREEN_WIDTH
    posy_fin = SCREEN_HEIGHT
    cadena_binario = "01"
 
    while 1:
        car = random.randrange(len(cadena_binario))
        green = random.randrange(0,39)
        text = font.render(cadena_binario[car],1,(12,green,12))
        screen.blit(text,(posx_ini,posy_ini))
 
        if (posx_ini >= 0 and posx_ini <= posx_fin):
            posx_ini = posx_ini + 10
 
        else:
            posx_ini = 0
            posy_ini = posy_ini + 10
        if posx_ini == posx_fin and posy_ini == posy_fin:
            posx = random.randrange(SCREEN_WIDTH)
            posy = 0
            genera_matrix(posx,posy)
        pygame.display.flip()
 
def main():
    if not pygame.font:
        print "Desabilitado Tipo de Letras"
 
    else:
        pygame.font.init()
 
    global SCREEN_WIDTH, SCREEN_HEIGHT, screen
    SCREEN_WIDTH  = 640
    SCREEN_HEIGHT = 480
    pygame.init()
    screen = pygame.display.set_mode((SCREEN_WIDTH,SCREEN_HEIGHT))
    pygame.display.set_caption("PyMatrix")
    genera_binario()
 
if __name__=="__main__":
    main()