如何在程序中修复未定义的变量？

我是AppleScript的初学者。我正在尝试开发一个可以生成实际随机数的程序。当我设置将用于生成随机数的数字的值时，编辑器给我一个错误：

未定义变量numberOne。

我知道这意味着什么，但是我不知道为什么它没有定义。有人可以帮忙吗？

我试过看看是否只有字符串而不是文本可以工作，但这似乎没有实现。可能确实很容易解决此问题，但是正如我所说，我是一个初学者。

on variableValue()
    set numberOne to text returned of (display dialog "Variable One:" default answer "" with icon note buttons {"Cancel", "Continue"} default button 2 with title "Random Number Generator 3") as string
    set numberTwo to text returned of (display dialog "Variable Two:" default answer "" with icon note buttons {"Cancel", "Continue"} default button 2 with title "Random Number Generator 3") as string
    set numberThree to text returned of (display dialog "Variable Three:" default answer "" with icon note buttons {"Cancel", "Continue"} default button 2 with title "Random Number Generator 3") as string
    set numberFour to text returned of (display dialog "Variable Four:" default answer "" with icon note buttons {"Cancel", "Continue"} default button 2 with title "Random Number Generator 3") as string
    set numberFive to text returned of (display dialog "Variable Five:" default answer "" with icon note buttons {"Cancel", "Continue"} default button 2 with title "Random Number Generator 3") as string
    set useSameValues to button returned of (display alert "Use same values?" message "If you re-generate a new number, do you want to use the same values?" as critical buttons {"Cancel", "No", "Yes"} default button 3)
    if useSameValues = "No" then
        set useSameValuesTwo to "false"
    else if useSameValues = "Yes" then
        set useSameValuesTwo to "true"
    end if
end variableValue
variableValue()
on randomNumber()
    -- The line of code just beneath this text is where the error shows up (This is my first program that utilizes handlers, so something could be wrong there).
    set numberSix to (numberOne + numberTwo + numberThree + numberFour + numberFive)
    set numberSeven to (numberSix * (random number from 1 to (random number from 2 to 100)))
    set possibleValueOne to (random number from 1 to 5)
    if possibleValueOne = 1 then
        set numberEight to (numberSeven - numberOne)
    else if possibleValueOne = 2 then
        set numberEight to (numberSeven - numberTwo)
    else if possibleValueOne = 3 then
        set numberEight to (numberSeven - numberThree)
    else if possibleValueOne = 4 then
        set numberEight to (numberSeven - numberFour)
    else if possibleValueOne = 5 then
        set numberEight to (numberSeven - numberFive)
    end if
    set numberNine to (numberEight - 100000)
end randomNumber
randomNumber()