[decisiveness]

This is a cool idea, but the light show going off erroneously in my own home for the opposing team would be disheartening to any die hard fan. Any chance of this happening, let alone once every 4 games, would be unacceptable. And the pain of knowing I rigged it up myself would make it that much worse. I applaud OP for the wherewithal it must've taken to see this project through to the end.

[ddcarnage]

lol well it does go off erroneously sometimes... statistically speaking once every 4 games. BUT... I do have the big USB button ready to cancel the light show and goal song. Something I did not mention in the blog post is that it stops the goal song by playing the Fail Trombone sound (https://www.youtube.com/watch?v=iMpXAknykeg) when you use the USB button to cancel light show. Yes really disheartening, but the one time it happened it made the whole thing pretty funny actually :)

[decisiveness]

Nice work, and great mood lightening sound :)

Maybe it would be more accurate to detect when the siren light behind the goal goes off if it's always viewable on screen.