[efortis]

That reminded me of a base4 encoding using these characters: '0' 'O' '1' 'I'

The code looked like:

    var O11IOOO1I011 = 1<<1, 
        II00001OOO1O = 1<<2;

[darknavi]

No lowercase 'l' in there?

[efortis]

Probably.

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This one binary encoded with tabs and spaces:

https://www.youtube.com/watch?v=cQY7klANahY