Fix: image path

Also, set quotes according to standard

juego.py

@@ -175,14 +175,16 @@ def choose_level(self):
             pygame.display.update()
 
     def play(self, level):
-        die_point = {"facil":200,"medio":100,"dificil":60}
+        NUM_IMAGES = 1
 
+        die_point = {"facil":200,"medio":100,"dificil":60}
 
         another_quest = True
 
         right_sound = load_sound("./data/right.ogg")
         wrong_sound = load_sound("./data/wrong.ogg")
-        fondo = [load_image("1.jpg")]
+        fondo = [load_image("data/" + str(x) + ".jpg") for x in range(0,NUM_IMAGES)]
+        random_index = random.randint(0,NUM_IMAGES - 1)
         score = 0
         puntuacionalta = load_puntuacionalta()
 
@@ -203,7 +205,7 @@ def play(self, level):
             nueva_expresion.preguntas.update(time,random.randint(80,155),level)
 
             self.screen.fill((0,0,0))   
-            self.screen.blit(fondo[0],(0,0))
+            self.screen.blit(fondo[random_index],(0,0))
             self.screen.blit(self.fuente_32.render("Puntaje: " + str(score),True,(0,0,0)),(410,0))
             self.screen.blit(self.fuente_32.render("Puntaje Mas Alto: " + str(puntuacionalta),True,(0,0,0)),(600,0))
             self.screen.blit(nueva_expresion.expresion,(600,750))