Guitar frets notes map with Codea

Couldn’t find a pic where standard tuned guitar frets would be displayed as black+white piano keys. So I’ve coded a little script/app for that using Codea (IDE+runtime for coding for iPad using Lua):

This is 7-string (electric) guitar in Standard tuning (i.e. just like 6-string + 1 additional string for lower notes), ’cause I have a 7-string one – so I needed that additional string too.

Teh Code:
https://github.com/mvmn/GuitarPiano-for-Codea/blob/master/src/Main.lua

Yep, it also produces sounds when keys/frets are touched (with multitouch). Codea is fun.

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groovyshp.bat

%~dp0\groovysh "Eval.me(new File(\"%1\").text);"

Or is there a better way to run groovysh with script file as parameter?