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This uses one (1) advanced monitor to display the keys.
To download do
pastebin get 60qv5SkV startup
Edit the script to fit your needs such as the peripheral to wrap, the redstone side and the code.
To use it, build a contraption like so:
The computer can be a regular computer, but the monitor must be advanced.
Then when you run startup, you'll get a interface on your monitor like so:
To check if the code is correct, press the green button, to clear it, press the red button.
The default code is 0000
