why it is not defined??

import pygame,svs pygane.init() a = input("Please enter the filename of the background image:") b pygane.inage.load(a) (width, height) = b.get_rect().size background display = pygane.display . Set mode((width, helght)) background pygame.inage.load (a).convert() background displav.blit(background, (o, 0)) pygane.display.update() cint(input("how many ninjas (1-8) that you want added:")) =True while C: if c=-1: d = pygame.inage.load(ninja_image-01.bmp) (width1. height!) = d.get ect(). Size display = pygame . display. Set mode((width1. height!)) displaynew = d.set_at((width1, height!), (0, 231, 26)) y = pyga e.inage . load(ninja_inage-01.b p).convert() background.blit(y, (0, 0)) pygane.display.update()