How to Script a Surface Area of a Sphere Calculator

Hello, and welcome to my very first instructable. I appologize if the video takes long to download or if it is low resolution. Also please do not point out any spelling mistakes.

Anyway I hope this calculator helps.

any apple devise (large screen and keyboard/mouse really helps).

In the code you have to follow Exactly what I did or else it will work. YOU DO NOT have to add the comments to what I did, If you want to add notes you have to type a -- before everything or else your computer will think it is a code.

You will need to go to any scripting platform that supports LUA code https://repl.it.

If the video is low definition then then the image should help. If your code does not look like this (without the little messages) then It will not work (not really I am sure there are other ways to make this calculator).

key words (color words)
local function: a function which makes a variable work.

local: a variable which you can give a value and interact with other variables, for instance x+y

*: the star is just multiplication

/: division

print "' : a code that writes a message

print () :a code that writes the value of something

Again thank for reading/watching my first instructable.