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For the lazy like me: https://github.com/GregTJ/stable-fluids
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Stream
Stream - Scalable APIs for Chat, Feeds, Moderation, & Video. Stream helps developers build engaging apps that scale to millions with performant and flexible Chat, Feeds, Moderation, and Video APIs and SDKs powered by a global edge network and enterprise-grade infrastructure.
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rpi-rgb-led-matrix
Controlling up to three chains of 64x64, 32x32, 16x32 or similar RGB LED displays using Raspberry Pi GPIO
I already have the matrix running and working, I used this library. It has a python interface as well. I posted it here in case you want to check it out. It has examples for scrolling text, displaying pictures, displaying animated gifs, displaying videos. Pretty good library.
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Check out this clock example I found.