now = time()
enemiesrect = []
if now - self.start > self.elapsed:
    '''make a enemy when 5 secs have passed'''
    self.elapsed = self.elapsed + 5
    d = self.id_generator()
    x = random.randint(0, 600)
    y = random.randint(0, 600)
    self.enemies.append(Enemy(x, y)) 
    enemiesrect.append(self.enemies[d].rect)