Not related to Pimatic, just wanted to share this with you guys.
I created a LED Panel connected to websockets. You can create a drawing on my website and it will show up in real time. It runs on a Raspberry Pi 1 with the https://www.adafruit.com/product/420 and the software is mostly NodeJS.
Check out the video here: http://timvandevathorst.nl/blog/interactive-led-clock
Let me know what you think !