import random #Program will be making use of random numbers so you have to import the random library

def board2(x,y):#This is the function that displays the board
    a=["__","__","__","__","__","__","__","__","__","__","__","__","__","__","__","__","__","__","__","__","__","__","__","__","__","__","__","__","__","__","__","__","__","__","__","__","__","__","__","__","__","__","__","__","__","__","__","__","__","__"]
    # ABOVE is the array that stores the value fo each square. each value is two undelined spaces
    # BELOW The variables X and Y are passed to this function. They represent the players score. This loop loops through the array using the variable I.
    # BELOW If i=x or 1= y or they both = i then the if statement below writes the appropriate letters in the array.
    for i in range(50): 
        if i==x and i==y:
            a[i]="AB"
        elif i==x:
            a[i]="A_"
        elif i==y:
            a[i]="_B"
  
    #BELOW the board is printed with the array being updated based on the values of X and Y
    print("|_"+a[43] +"_|_"+a[44] +"_|_"+a[45] +"_|_"+a[46] +"_|_"+a[47] +"_|_"+a[48] +"_|_"+a[49] + "_|")
    print("|_"+a[42] +"_|_"+a[41] +"_|_"+a[40] +"_|_"+a[39] +"_|_"+a[38] +"_|_"+a[37] +"_|_"+a[36] + "_|")
    print("|_"+a[29] +"_|_"+a[30] +"_|_"+a[31] +"_|_"+a[32] +"_|_"+a[33] +"_|_"+a[34] +"_|_"+a[35] + "_|")
    print("|_"+a[28] +"_|_"+a[27] +"_|_"+a[26] +"_|_"+a[25] +"_|_"+a[24] +"_|_"+a[23] +"_|_"+a[22] + "_|")
    print("|_"+a[15] +"_|_"+a[16] +"_|_"+a[17] +"_|_"+a[18] +"_|_"+a[19] +"_|_"+a[20] +"_|_"+a[21] + "_|")
    print("|_"+a[14] +"_|_"+a[13] +"_|_"+a[12] +"_|_"+a[11] +"_|_"+a[10] +"_|_"+a[9] +"_|_"+a[8] + "_|")
    print("|_"+a[1] +"_|_"+a[2] +"_|_"+a[3] +"_|_"+a[4] +"_|_"+a[5] +"_|_"+a[6] +"_|_"+a[7] + "_|")

print("Welcome to the big number game")
while True: # This loop will ask how many players until they type a correct response.
    play=input("Would you like A: 1 player or B: 2 player game")
    if play=="A":
        players=1
        break
    elif play=="B":
        players=2
        break
    else:
        continue

if players==2: # The main algorithm for if there are TWO players
    print(str(players) + " player game")
    print("Let's play")
    x=1 # Obviously a new game so let's reset those counter variables
    y=1
    board2(x,y)# prints the board with x and Y being 1 (first squar on the board)
    while True:#The main game loop. This will run until a player rwaches above 49, then we will break from the loop
        input("press enter to roll the dice player 1")
        go1=random.randint(1,7)#generates random numbers and puts them in the variables GO1 and GO2
        go2=random.randint(1,7)
        if go1==go2:# Checks for a double
            print("oh no a double. You have to go back!")
            x=x-(go1+go2)#updates x (which is the counter) by taking GO1 and GO2 away
            if x<1:# Just in case the above subtraction takes the X counter below 1
                x=1
        else: # If not a double we add GO1 and GO 2 to the X counter
            x=x+go1+go2
        print("You rolled a " + str(go1)+ " and a " + str(go2))
        if x>48:
            x=49
        board2(x,y) #Calls the function with the new X and Y values
        if x<49:#If X (player 1's score) is still less than 49, the game continues, coz he hasn't won
            input("press enter to roll the dice player 2")#Same as above but for player 2 and using the counter Y
            go3=random.randint(1,7)
            go4=random.randint(1,7)
            if go3==go4:
                print("oh no a double. You have to go back!")
                y=y-(go3+go4)
                if y<1:
                    y=1
            else:
                y=y+go3+go4
            print("You rolled a " + str(go3)+ " and a " + str(go4))
            if y>48:
                y=49
            board2(x,y)
            if y>48:# If Y greater than 48, player two is the winner
                win="B"
                break # breaks the loop, no more turns
        else:#If X is not less than 49, player one is the winner
            win="A"
            break # breaks the loop, no more turns
else: # This is the one player game. It is similar to the 2 player game but we just ask for X to be played, we set Y to zero so it can't be seen on the board
    print(str(players) + " player game")
    print("Let's play")
    x=1
    y=0
    board2(x,y)
    while True:
        input("press enter to roll the dice player 1")
        go1=random.randint(1,7)
        go2=random.randint(1,7)
        if go1==go2:
            print("oh no a double. You have to go back!")
            x=x-(go1+go2)
            if x<1:
                x=1
        else:
            x=x+go1+go2
        print("You rolled a " + str(go1)+ " and a " + str(go2))
        board2(x,y)
        if x>48:
            win="A"
            break
  
if win=="A":#Checks the vaue of the variable A and prints out a well done message 100 times!
    for i in range(100):
        print("Well done player 1")
else:
    for i in range(100):
        print("Well done player 2")