import time
import sys
import random
x=0
fcredit=0
while x!=1:
    error1=True
    error2=True
    while error1==True:
        try:
            print"\n"
            print"       +++++++++++++++++++++++++++++++++++++"
            print"       ++!Welcome to RBDC Vending Machine!++"
            print"       +++++++++++++++++++++++++++++++++++++"
            print"               ***Build-1.2 FINAL***\n"
            print"***You need more than $0.50 to purchase any item***\n"
            print"           ***Your Credit is $ %0.2f***\n"%fcredit
            a=float(input("How many 10p : $ "))
            b=float(input("How many 20p : $ "))
            c=float(input("How many 50p : $ "))
            d=float(input("How many  £1 : $ "))
            print"\n"
            credit=(10*a)+(20*b)+(50*c)+(100*d)
            totalcredit=credit/100
            fcredit=fcredit+totalcredit
            if fcredit < 0.50:
                print"You don't have enough credit.\n***Enter more credit***\n"
            elif fcredit >= 0.50:
                print "         ***Your credit now is $ %0.2f***"%fcredit
                print "\n"
                error1=False
        except NameError:
            print"Not a number. Please try again."
            time.sleep(1)
        except SyntaxError:
            print"Not a number. Please try again."
            time.sleep(1)

    print"++!Welcome to RBDC Vending Machine!++\n"
    print"  |*****************************|"
    print"  |++   ++ +++++ ++   ++ ++   ++|"
    print"  |+++ +++ +     +++  ++ ++   ++|"
    print"  |++ + ++ ++++  ++ + ++ ++   ++|"
    print"  |++   ++ +     ++  +++ ++   ++|"
    print"  |++   ++ +++++ ++   ++  +++++ |"
    print"  |*****************************|"
    print"\n"
    time.sleep(1)
    #generates a random number of stock for each item.
    coke = random.randrange(0,10)
    pepsi = random.randrange(0,6)
    walkers = random.randrange(0,15)
    snikers = random.randrange(0,12)
    mars = random.randrange(0,8)
    mountaindew = random.randrange(0,9)

    print"1)*There are",coke,"Coca-Cola-$0.89"
    print"2)*There are",pepsi,"Pepsi-$0.79"
    print"3)*There are",walkers,"Walkers-Cheese & Onion-$0.49"
    print"4)*There are",snikers,"Snikers-$0.37"
    print"5)*There are",mars,"Mars-$0.34"
    print"6)*There are",mountaindew,"Mountain Dew-$0.79\n"
    print"***Your credit is $ %0.2f"%fcredit,"***\n"

    while error2==True:
        try:
            vending=input("Select a Option: ")
            if vending >= 7:
                print"Enter a number between 1-6. Please try again."
            elif vending==0:
                print"Enter a number between 1-6. Please try again."
                error2=False
            else:
                print"Enter a number between 1-6. Please try again."
        except NameError:
            print"Enter a number between 1-6. Please try again."
            time.sleep(1)
        except SyntaxError:
            print"Enter a number between 1-6. Please try again."
            time.sleep(1)


    if vending==1:
        if coke ==0:#checks for stock
            print"This item is currently unavailable.\nYour credit is %0.2f"%fcredit
            time.sleep(1)
        elif fcredit < 0.89:#checks if there is enough credit to buy this item.
            print"You don't have enough credit to purchase this item."
            print"Your credit is %0.2f"%fcredit
        elif coke >=1:#checks if coke is more than 0.
            print"You have chosen to despence a Coke can."
            blah = "..."
            for l in blah:
                sys.stdout.write(l)
                sys.stdout.flush()
                time.sleep(1.2)
            fcredit=fcredit-0.89
            print"\nChange due is $ %0.2f"%fcredit
            print"\n"
            time.sleep(1)