A turing machine in 79! bytes of javascript
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version 1.3

Original idea by http://swizec.com/blog/a-turing-machine-in-133-bytes-of-javascript/swizec/3069#

Demo http://jsfiddle.net/WcjZ5/6/

Thx @subzey, @Kambfhase, @tsaniel for help!