Hi, I'm trying to build an interactive display for Christmas similar to what's shown

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Hi,
I’m trying to build an interactive display for Christmas similar to what’s shown https://www.youtube.com/watch?v=qwWkKQoja8s. Instead of using sound as the trigger, I would like to have 3 buttons, 1 for red, 1 for green, and 1 for white. Each time the button is pushed, a block is sent to the end of the string. My code currently achieves this, barring that the previous block has already reached the end of the string. My goal is to have it so that I can send as many blocks as I can click the button.

Here is my code.(currently only red and green buttons are setup) https://gist.github.com/Burand05/7ecb426b0bd88a9b08fdebb0354b6f95

I’m a beginner-intermediate programmer. I tried modifying the code in shown in the youtube video above (http://pastebin.com/XkpnK5Ph), but unfortunately it wasn’t written utilizing FastLed, and it’s using the IC for something (I think), so I scrapped trying to retrofit it to my purposes.

I’m using WS2811’s that I got from Holiday Coro.
Arduino Uno ATmega328P
FastLED version 3.001.003

Any help would be appreciated.

Finally, thank you to the FastLED crew and community for building and supporting such a helpful tool.

Regards

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Hi, a buddy to help me get this working. It was SIGNIFICANTLY easier to implement than i imagined.

Here is the solution if anyone is interested.