game_on = True
while game_on:

    print('Welcome to Tic Tac Toe!')
    board = ['#',' ',' ',' ',' ',' ',' ',' ',' ',' ']

    player=choose_first()
    print(player)


    while not full_board_check(board):
            if player == 'Player 1 goes first':
                    choice = player_input()
                    if space_check(board, choice):
                        place_marker(board, 'X', choice)
                            display_board(board)

                else:
                        print('Please pick an available position')
                        choice = player_choice(board)
                        place_marker(board, 'X', choice)
                        display_board(board)

                player = 'Player 2 goes first'

             if win_check(board,'X'):
                        display_board(board)
                        print('You win with 3 Xs in a row!')
                        break

         if player == 'Player 2 goes first':
                    choice = player_input()

                 if space_check(board, choice):
                            place_marker(board, 'O', choice)
                            display_board(board)

                    else:
                            print('Please pick an available position')
                            choice = player_choice(board)
                            place_marker(board, 'O', choice)
                            display_board(board)

                    player = 'Player 1 goes first'

                    if win_check(board,'O'):
                            display_board(board)
                            print('You win with 3 Os in a row!')
                            break

    if replay():
            game_on = True