#Zach Krasne 
        #Purpose: Executes a Vigenere cipher
        #Input: Word to be coded and keyword from user
        #Output: Encoded word to Graphics window text box

        #Requires a Python Graphics Library

        from graphics import *
        def code(message, keyword):
            #Create a reference list for the cipher
            alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"

            encodedWord = ""

            #Find the ciphered letter and add it into the empty string
            for i in range(len(message)):
                shiftNum = alphabet.find(keyword[i % len(keyword)]) + 1
                indexOfLetterToShift = alphabet.find(message[i])
                encodedWord += alphabet[(indexOfLetterToShift + shiftNum) % 26]
            return encodedWord

        def wordPrep(word):
            #Get rid of the spaces and capitalize all the words
            wordList = word.split()
            newWord = ""
            for item in wordList:
                capWord = item.upper()
                newWord += capWord
            return newWord

        def main():
            #Initiate the Graphics Window and set it up
            win = GraphWin("Vigenere Cipher", 400, 400)

            win.setBackground("lightblue")

            messageText = Text(Point(120, 175), "Message to be Encoded:")
            keyText = Text(Point(120, 200), "Key word for encryption:")

            messageText.draw(win)
            keyText.draw(win)

            #Initialize the entry objects to get user input
            userWord = Entry(Point(250, 175), 15)
            userKey = Entry(Point(250, 200), 15)

            userWord.draw(win)
            userKey.draw(win)

            win.getMouse()

            #Get the strings formatted, then encrypt them
            userWordCap = wordPrep(userWord.getText())
            userKeyCap = wordPrep(userKey.getText())

            encoded = code(userWordCap, userKeyCap)

            #Reset the window to display the final encryption 
            userWord.undraw()
            userKey.undraw()
            messageText.undraw()
            keyText.undraw()

            result = Text(Point(200, 200), encoded)
            result.setSize(25)
            result.draw(win)

            instructions = Text(Point(200, 350), "Click anywhere to close window.")
            instructions.draw(win)

            win.getMouse()
            win.close()

        main()