How to show monster?

import random
import pyautogui
import sys

# draw grid
# pick random location for player
# pick random location for exit door
# pick random location for monster
# draw player in the grid
# take input for movement
# move player, unless invalid move (past edges of grid)
# check for win/loss
# clear screen and redraw screen

CELLS = [(0, 0), (1, 0), (2, 0), (3, 0), (4, 0),
         (0, 1), (1, 1), (2, 1), (3, 1), (4, 1),
         (0, 2), (1, 2), (2, 2), (3, 2), (4, 2),
         (0, 3), (1, 3), (2, 3), (3, 3), (4, 3),
         (0, 4), (1, 4), (2, 4), (3, 4), (4, 4),
         ]


# function to clean the screen
def clear_screen():
    # os.system('cls' if os.name == 'nt' else 'clear')
    pyautogui.hotkey('ctrl', 'l')       # no command but ctrl

# get the location of the player, of the door and of the monster
def get_locations():
    return random.sample(CELLS, 3)

# move the player according to the move input. player stands for player position
def move_player(player, move):
    x, y = player
    if move == "LEFT":
        x -= 1
    if move == "RIGHT":
        x += 1
    if move == "UP":
        y -= 1
    if move == "DOWN":
        y += 1
    return x, y

# check whether the input move can be accepted or not
def get_moves(player):
    moves = ["LEFT", "RIGHT", "UP", "DOWN"]
    x, y = player
    if y == 0:
        moves.remove("UP")
    if y == 4:
        moves.remove("DOWN")
    if x == 0:
        moves.remove("LEFT")
    if x == 4:
        moves.remove("RIGHT")
    return moves

# draw the map showing the player position
def draw_map(player):
    print(" _"*5)
    tile = "|{}"

    for cell in CELLS:
        x, y = cell
        if x < 4:
            line_end = ""
            if cell == player:
                output = tile.format("X")
            else:
                output = tile.format("_")
        else:
            line_end = "\n"
            if cell == player:
                output = tile.format("X")
            else:
                output = tile.format("_|")
        print(output, end=line_end)


def play_again():
    print("Do you want to play again? Y/N?")
    again = input("> ").upper()
    if again == "Y":
        game_loop()
    elif again == "N":
        print("Bye Bye!")
        sys.exit()
    else:
        print("Sorry, I didn't get what you want to do. Tell me again")
        play_again()

def set_win(player, door, monster):

    # set win
    if player == door:
        print("You found the door! You Escaped!")
        show_position(player, door, monster)
        play_again()

    # set loss
    elif player == monster:
        print("Oh no! The monster ate you!")
        print("The door was in {}!".format(door))
        show_position(player, door, monster)
        play_again()



def show_position(player, door, monster):
    print(" _" * 5)
    tile = "|{}"

    for cell in CELLS:
        x, y = cell
        if x < 4:
            line_end = ""
            if cell == player:
                output = tile.format("X")
            if cell == monster:
                output = tile.format("M")
            if cell == door:
                output = tile.format("D")
            else:
                output = tile.format("_")
        else:
            line_end = "\n"
            if cell == player:
                output = tile.format("X")
            if cell == monster:
                output = tile.format("M")
            if cell == door:
                output = tile.format("D")
            else:
                output = tile.format("_|")
        print(output, end=line_end)


def game_loop():
    monster, door, player = get_locations()
    print(door)
    print(monster)
    while True:
        draw_map(player)
        valid_moves = get_moves(player)
        print("You are currently in room {}".format(player))
        print("You can move {}".format(", ".join(valid_moves)))
        print("Enter QUIT to quit")

        move = input("> ")
        move = move.upper()

        if move == 'QUIT':
            break
        elif move in valid_moves:
            player = move_player(player, move)
        else:
            input("\n ** Walls are hard! Don't run into them ** \n")    #input instead of print so we have to insert return or whatever to keep playing. In this way our clear function is nt deleting our Careful message
        set_win(player, door, monster)
        clear_screen()


clear_screen()
print("Welcome to the Dungeon!")
input("Press return to start")
clear_screen()
game_loop()

        draw_map(player)
        valid_moves = get_moves(player)
        # fill with player position
        print("You're currently in room {}".format(player))
        # fill with available moves
        print("You can move {}".format(", ".join(valid_moves)))
        # is monster & door set??
        print("Monster is in {}".format(monster))
        print("Door is in {}".format(door))
        print("Enter QUIT to end the game.")
          ```