def hero_sprites():
global heroes
global widow
global cap
global tony
global thor
global hawkeye
global hulk
widow = Widow()
cap = Cap()
tony = Tony()
thor = Thor()
hawkeye = Hawkeye()
hulk = Hulk()
heroes = pygame.sprite.Group()
heroes.add(cap)
heroes.add(widow)
heroes.add(tony)
heroes.add(thor)
heroes.add(hawkeye)
heroes.add(hulk)