У вашего броузера проблема в совместимости с HTML5
8x8x8 LED Cube with breadboard control circuit
Animations:
40 on ATmega1284P
7 from PC + Spektrum Analyser
Sources:
control circuit + code from:
http://leyanda.de/light/ledcube.php
extra circuit + code for PC connection and more animations:
http://instructables.com/id/Led-Cube-8x8x8/
spektrum analyser code:
http://youtu.be/oFzWhbHzO_Q