Vê ai

#imports:
from PPlay.window import *
from PPlay.sprite import *
from PPlay.gameimage import *
from PPlay.sound import *
#Janela:
win = Window(400,600)
win.set_title('Projt Space Invaders - João Felipe e Raphael Leardini')
#game_speed:
GAME_SPEED = 200
#funções
inimigos = []
linha = []
checkspawn = 0
def createnimies():
    for x in range(1, 5):
        for i in range(1 , 7):
            enemy = Sprite('enemy.png')
            enemy.x = enemy.width * i + i * 15 + win.width - 11 * enemy.width
            enemy.y = x * enemy.height + x * 25
            linha.append(enemy)
        inimigos.append(linha)
while True:
    win.set_background_color((0,255,255))
    if checkspawn == 0:
        createnimies()
        checkspawn += 1
    for l in inimigos:
        for e in l:
            if(e.x <= 0):
                e.x += 50
            elif(e.x + e.width >= win.width):
                e.x -= 50
            e.draw()
    win.update()