Matlibplot inside of a thread alongside Tkinter

Question

Error inside of the terminal.

/Users/aidan/Documents/GitHub/Perceptual/Threading.py:81: UserWarning: Starting a Matplotlib GUI outside of the main thread will likely fail.
  plt.show()
2022-11-06 14:28:07.960 Python[25376:1206036] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'NSWindow drag regions should only be invalidated on the Main Thread!'

Code of the python project.

import time

import tkinter as tk
#import tkinter as tkk
from tkinter.ttk import *
from PIL import Image, ImageTk
import random
import threading

#imports for BackEnd
import pyautogui as mouse
import matplotlib.pyplot as plt

#Created Global Array
x = []
y = []

root = tk.Tk()
root.title("Perceptual Threading")
root.geometry("900x600")

#Sperates the canvase into diffrent coloms
root.columnconfigure(6, weight = 0)
root.rowconfigure(10, weight = 0)

def BackEndDebug():
    DebugInt = 0
    while(DebugInt != -1):
        DebugNumber.config(text=f'Random Number: {DebugInt}')
        DebugInt += 1
        time.sleep(0.0000000001)

#Load Logo
def LoadLogo():
    logo = Image.open("PerceptualLogoTransparent.png")
    logo = logo.resize((125, 125))
    logo = ImageTk.PhotoImage(logo)
    logo_label = tk.Label(image = logo)
    logo_label.image = logo
    logo_label.grid(column=0, row=0, sticky=tk.W, padx=5, pady=5)

def LoadDashboard():
    Dashboard = Image.open("Mercades Dashboard .jpeg")
    Dashboard = Dashboard.resize((775,300))
    Dashboard = ImageTk.PhotoImage(Dashboard)
    Dashboard_label = tk.Label(image = Dashboard)
    Dashboard_label.image = Dashboard
    Dashboard_label.grid(column = 2, row = 6, columnspan=3, rowspan=2)

def MouseGraph():
    control = True
    count = 0
    t = 1
    inc = .1
    check1, check2, check3 = 0, 1, 2

    mouse.moveTo(960, 540)
    while control:
        thing = mouse.position()
        y.append(thing[0] - 960)
        x.append(inc * t)
        if thing[1] > 540 or thing[1] < 540:
            mouse.moveTo(thing[0], 540)
        count += 1
        t += 1
        if count > 2:
            if (y[check2] < y[check1] and y[check2] < y[check3]) or (y[check2] == y[check1] and y[check2] < y[check3]):
                print(f'{y[check2]} is the relative minimum.')
            if (y[check2] > y[check1] and y[check2] > y[check3]) or (y[check2] == y[check1] and y[check2] > y[check3]):
                print(f'{y[check2]} is the relative maximum.')
            check1 += 1
            check2 += 1
            check3 += 1

        if count > 100:
            control = False
            # return(x, y)
            plt.plot(x, y)
            plt.xlabel('time')
            plt.ylabel('distance turned')
            plt.show()
        time.sleep(inc)


DebugNumber = Label(root, text="Debug Number!")
DebugNumber.grid(column= 6, row= 0, sticky=tk.E)

StartBackendDebug = Button(root, text="Start the BackendDebug", command =       threading.Thread(target=BackEndDebug).start)
StartBackendDebug.grid(column= 5, row= 0, sticky=tk.E)

StartGraph = Label(root, text="Start Graph!")
StartGraph.grid(column= 6, row= 1, sticky=tk.E)

StartGraphButton = Button(root, text="Begin", command = threading.Thread(target=MouseGraph).start)
StartGraphButton.grid(column= 5, row= 1, sticky=tk.E)

LoadLogo()
LoadDashboard()

root.mainloop()

I have tried returning the arrays after making them global variables but I do not know how to then have a call after the thread is over. This is my first project using threading and am unsure if I need to add classes or what. Is there a way to call the method of a class from another class or run the code in the main thread without Tkinter having an issue. I have also tried looking into other graphing methods but this seems to be the only real way.