function caesarCipher rot phrase
    local rotPhrase, lowerLetters, upperLetters
    put "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz" into lowerLetters
    put "ABCDEFGHIJKLMNOPQRSTUVWXYZABCDEFGHIJKLMNOPQRSTUVWXYZ" into upperLetters
    repeat for each char letter in phrase
        get charTonum(letter)
        if it >= 65 and it <= 90 then
            put char ((it + rot) - 64) of upperLetters after rotPhrase
        else if it >= 97 and it <= 122 then
            put char ((it + rot) - 96) of lowerLetters after rotPhrase
        else
            put letter after rotPhrase
        end if
    end repeat
    return rotPhrase
end caesarCipher