trjhtr

I am trying to make a player vs player Tic Tac Toe game using pygame.
So far I got a simple grid setup that shows me the coordinates and changes the box color to green when it's clicked.

How do I make 'x' and 'y' depending on which players turn it is, instead of a green box all the time.

 import pygame

 # Define some colors
 BLACK = (0, 0, 0)
 WHITE = (255, 255, 255)
 GREEN = (0, 255, 0)
 RED = (255, 0, 0)


 # ------- VARIABLES ------------
 WIDTH = 160
 HEIGHT = 160
 MARGIN = 5



 # ------- FUNCTIONS ---------------
 # Create a 2 dimensional array. A two dimensional
 # array is simply a list of lists.
 grid = 
 for row in range(10):
 # Add an empty array that will hold each cell
 # in this row
 grid.append()
 for column in range(10):
 grid[row].append(0) # Append a cell

 # Set row 1, cell 5 to one. (Remember rows and
 # column numbers start at zero.)
 grid[1][5] = 1

 # Initialize pygame
 pygame.init()

 # Set the HEIGHT and WIDTH of the screen
 WINDOW_SIZE = [500, 500]
 screen = pygame.display.set_mode(WINDOW_SIZE)

 # Set title of screen
 pygame.display.set_caption("Array Backed Grid")

 # Loop until the user clicks the close button.
 done = False

 # Used to manage how fast the screen updates
 clock = pygame.time.Clock()

 # -------- Main Program Loop -----------
 while not done:
 for event in pygame.event.get(): # User did something
 if event.type == pygame.QUIT: # If user clicked close
 done = True # Flag that we are done so we exit this loop
 elif event.type == pygame.MOUSEBUTTONDOWN:
 # User clicks the mouse. Get the position
 pos = pygame.mouse.get_pos()
 # Change the x/y screen coordinates to grid coordinates
 column = pos[0] // (WIDTH + MARGIN)
 row = pos[1] // (HEIGHT + MARGIN)

 # Which players turn is it?
 grid[row][column] = 0
 grid[row][column] = 1
 grid[row][column] = 2
 print("Click ", pos, "Grid coordinates: ", row, column)

 # Set the screen background
 screen.fill(BLACK)

 # Draw the grid
 for row in range(10):
 for column in range(10):
 color = WHITE
 # Empty
 if grid[row][column] == 0:
 color = WHITE
 # Player Y
 if grid[row][column] == 1:
 color = GREEN
 #Player X
 if grid[row][column] == 2:
 color = RED
 pygame.draw.rect(screen,
 color,
 [(MARGIN + WIDTH) * column + MARGIN,
 (MARGIN + HEIGHT) * row + MARGIN,
 WIDTH,
 HEIGHT])

 # Limit to 60 frames per second
 clock.tick(60)

 # Go ahead and update the screen with what we've drawn.
 pygame.display.flip()

 # Be IDLE friendly. If you forget this line, the program will 'hang'
 # on exit.
 pygame.quit()