I am kind of new to python, and am not the best at it, but I am kind of tearing apart a mindsweeper project to make it using pygame, and right now, it is just a square moving around every frame. The pygame window starts unfocused, and when I focus it, it crashes. Here is my code

import random
import pygame


class boardSpot(object):
    value = 0
    selected = False
    mine = False

    def __init__(self):
        self.selected = False

    def __str__(self):
        return str(boardSpot.value)

    def isMine(self):
        if boardSpot.value == -1:
            return True
        return False


class boardClass(object):
    def __init__(self, m_boardSize, m_numMines):
        self.board = [[boardSpot() for i in range(m_boardSize)] for j in range(m_boardSize)]
        self.boardSize = m_boardSize
        self.numMines = m_numMines
        self.selectableSpots = m_boardSize * m_boardSize - m_numMines
        i = 0
        while i < m_numMines:
            x = random.randint(0, self.boardSize-1)
            y = random.randint(0, self.boardSize-1)
            if not self.board[x][y].mine:
                self.addMine(x, y)
                i += 1
            else:
                i -= 1

    def __str__(self):
        returnString = " "
        divider = "n---"

        for i in range(0, self.boardSize):
            returnString += " | " + str(i)
            divider += "----"
        divider += "n"

        returnString += divider
        for y in range(0, self.boardSize):
            returnString += str(y)
            for x in range(0, self.boardSize):
                if self.board[x][y].mine and self.board[x][y].selected:
                    returnString += " |" + str(self.board[x][y].value)
                elif self.board[x][y].selected:
                    returnString += " | " + str(self.board[x][y].value)
                else:
                    returnString += " |  "
            returnString += " |"
            returnString += divider
        return returnString

    def addMine(self, x, y):
        self.board[x][y].value = -1
        self.board[x][y].mine = True
        for i in range(x-1, x+2):
            if i >= 0 and i < self.boardSize:
                if y-1 >= 0 and not self.board[i][y-1].mine:
                    self.board[i][y-1].value += 1
                if y+1 < self.boardSize and not self.board[i][y+1].mine:
                    self.board[i][y+1].value += 1
        if x-1 >= 0 and not self.board[x-1][y].mine:
            self.board[x-1][y].value += 1
        if x+1 < self.boardSize and not self.board[x+1][y].mine:
            self.board[x+1][y].value += 1

    def makeMove(self, x, y):
        self.board[x][y].selected = True
        self.selectableSpots -= 1
        if self.board[x][y].value == -1:
            return False
        if self.board[x][y].value == 0:
            for i in range(x-1, x+2):
                if i >= 0 and i < self.boardSize:
                    if y-1 >= 0 and not self.board[i][y-1].selected:
                        self.makeMove(i, y-1)
                    if y+1 < self.boardSize and not self.board[i][y+1].selected:
                        self.makeMove(i, y+1)
            if x-1 >= 0 and not self.board[x-1][y].selected:
                self.makeMove(x-1, y)
            if x+1 < self.boardSize and not self.board[x+1][y].selected:
                self.makeMove(x+1, y)
            return True
        else:
            return True

    def hitMine(self, x, y):
        return self.board[x][y].value == -1

    def isWinner(self):
        return self.selectableSpots == 0

def PygamePrintBoard():
    screen.fill((255, 255, 255))
    pygame.draw.rect(screen,[255,0,255], pygame.Rect(random.randint(0,(boardSize*50)), (random.randint(0,boardSize*50)), 60, 60))
    pygame.display.flip()
    clock.tick(30)

boardSize = int(input("Choose the Width of the board: "))
numMines = int(input("Choose the number of mines: "))
screen = pygame.display.set_mode([boardSize * 100, boardSize * 100])
clock = pygame.time.Clock()
gameOver = False
winner = False
Board = boardClass(boardSize, numMines)

gameOver = False
while not gameOver:
    PygamePrintBoard()

I tried making it 30 fps, from no fps cap, and that didn’t work and now I am really confused.