pygame error NameError: name 'enemy1' is not defined.

import pygame, sys
import random

pygame.init() #Initialization (must be)

pygame.display.set_caption("my game")


# # FPS 
clock = pygame.time.Clock()


#Set screen size
screen_width = 1150
screen_height = 648
screen = pygame.display.set_mode((screen_width, screen_height))

# Loading Background Images
background = pygame.image.load ("D:/python coding/no title").png")

# Calling up characters
character = pygame.image.load("D:/python coding/character).png")
pygame.transform.scale(charactor, (40, 40))
charactor_x = 650
charactor_y = 450

enemy1 = pygame.image.load ("D:/python coding/enemy1.png")
pygame.transform.scale(enemy1, (100, 100))
enemy1_x = 100
enemy1_y = 450

# Coordinates to move
to_x = 0
to_y = 0

# Travel speed
Charactor_speed = 1
enemy1_speed = 5


# Event Loop

while True: # For days in the game
    dt = clock.tick(150)
    For event in pygame.event.get(): # Some event occurs
        If event.type == pygame.QUIT: # Release an event that closes the window
            pygame.quit() # exit pygame
            sys.exit()

        if event.type == pygame.KEYDOWN:
            if event.key == pygame.K_LEFT:
                to_x -= Charactor_speed
            elif event.key == pygame.K_RIGHT:
                to_x += Charactor_speed
            elif event.key == pygame.K_UP:
                to_y -= Charactor_speed
            elif event.key == pygame.K_DOWN:
                to_y += Charactor_speed

        if event.type == pygame.KEYUP:
            if event.key == pygame.K_LEFT or event.key == pygame.K_RIGHT:
                to_x = 0
            elif event.key == pygame.K_UP or event.key == pygame.K_DOWN:
                to_y = 0

    charactor_x += to_x * dt
    charactor_y += to_y * dt 

    if charactor_x < 0:
        charactor_x = 0
    elif charactor_x > 1150:
        charactor_x = 1150
    if charactor_y < 0:
        charactor_y = 0
    elif charactor_y > 450:
        charactor_y = 450

    enemy1_x += enemy1_speed

    # # crash event
    charactor_rect = charactor.get_rect()
    charactor_rect.left = charactor_x
    charactor_rect.top = charactor_y

    enemy1_rect = enemy1.get_rect()
    enemy1_rect.left = enemy1_x
    enemy1_rect.top = enemy1_y

    #Confirm collision
    if charactor_rect.colliderect(enemy1_rect):
        del enemy1





    screen.blit(background,(0,0)) #Drawing a background

    screen.blit(character, (character_x, character_y)) # Draw a character

    screen.blit(enemy1, (enemy1_x, enemy1_y))

    pygame.display.update() # Redraw game screen