[charles_parnot]

You are totally right, and I actually also considered doing just that initially in my code.

[matiaspiipari]

I've just added support for layering using '#>>>' as a layer separator to ASCIImage Super Studio (http://asciimage.org/ass):

https://twitter.com/mz2/status/579080005453398017

Your lock example from above is shown here:

https://twitter.com/hodapp/status/579082721491705856

[matiaspiipari]

Ermm, second link was meant to be https://twitter.com/mz2/status/579083258631073792