Just a quick question on a small script taht is for some reason not working

I ran this script:

import serial
import time
import turtle


def serialreading():
    
    serialPort = serial.Serial(
    port="COM5", baudrate=9600, bytesize=8, timeout=2, stopbits=serial.STOPBITS_ONE
    )
    # Read data out of the buffer until a carraige return / new line is found
    serialString = serialPort.readline()
    turtlenumber = serialString.decode("Ascii")

    # Print the contents of the serial data to ASCII
    try:
        print(turtlenumber)
    except:
        pass


def roomview():
    
    t = turtle.Turtle()
    t.speed(0) # 1:slowest, 3:slow, 5:normal, 10:fast, 0:fastest
    t.forward(turtlenumber)
    time.sleep(1)
    turtle.reset()
    

while 1 > 0:
    
    serialreading()
    roomview()

with the goal for turtle to simply draw a line as long as the number coming into the serial communication (its variable being turtlenumber). for this example, the number should have been 1192, but i never got to see it in action since the shell is telling me “NameError: name ‘turtlenumber’ is not defined“

Pls help me out