MAZE GENERATOR PYTHON TURTLE

import turtle

wn = turtle.Screen()
wn.bgcolor("powderblue")
wn.title("Maze Generator")
wn.setup(1300,700)
wn.tracer(0)

pen=turtle.Turtle()
pen.hideturtle()
pen.up()
pen.color("white")
pen.goto(0, -250)
pen.write("MAZE TESTING",False,"center",font=("Arial Narrow",20,"bold"))


class Maze(turtle.Turtle):
    def __init__(self):
        turtle.Turtle.__init__(self)
        self.shape("square")
        self.color("white")
        self.penup()
        self.speed(0)

def setup(grid):
    global start_x, start_y, end_x, end_y
    for y in range(len(grid)):
        for x in range(len(grid[y])):
            character = grid[y][x]
            screen_x = -588 + (x * 24)
            screen_y = 288 - (y * 24)

            if character == "+":
                maze.goto(screen_x, screen_y)
                maze.stamp()
                walls.append((screen_x, screen_y))
maze = Maze()
walls = []

#MAIN PROGRAM
grid = [
"++++++++++++++++++++++++++++++++++++++++++++++",
"+                                           c+",
"+ ++++++++++++++++++++++++++++++++++++++++++ +",
"+                                            +",
"+ ++++++++++++++++++++++++++++++++++++++++++ +",
"+ ++++++++++++++++++++++++++++++++++++++++++ +",
"+                                            +",
"+ ++++++++++++++++++++++++++++++++++++++++++ +",
"+                                            +",
"+ ++++++++++++++++++++++++++++++++++++++++++ +",
"+ ++++++++++++++++++++++++++++++++++++++++++ +",
"+                                            +",
"+ ++++++++++++++++++++++++++++++++++++++++++ +",
"+                                            +",
"+ ++++++++++++++++++++++++++++++++++++++++++ +",
"+                                            +",
"+ ++++++++++++++++++++++++++++++++++++++++++ +",
"+                                            +",
"+o                                           +",
"++++++++++++++++++++++++++++++++++++++++++++++",
]

setup(grid)
wn.exitonclick()
#MADE BY AVMP
#https://www.youtube.com/channel/UCQor7IURWM-lGT-tmFbFSCw