ComputerCraft Keypad

A keypad that I made in Lua using the ComputerCraft mod that I wanted to show off.
Follow these steps to have this for yourself:
Open the startup file ("edit startup").
Type this exactly:
--
shell.run('rm keypad')
shell.run('pastebin get hYbvuqq2 keypad')
shell.run('keypad')
--
Then, reboot the in-game computer with "reboot".
The full code can be found at: https://pastebin.com/hYbvuqq2

This code will always be updated to the latest version, so you will set it and forget it!
Important
Make sure there is an advanced monitor on top of the computer.
To hook up the computer to a secret door, place redstone dust under the computer.