DemoReel runs solely on the ESP8266 - no Arduino / Teensy needed.
The HTML formatting leaves a LOT for improvement. Maybe someone with HTML skills can help to make it look good?
Just posted a new code here http://pastebin.com/KRcPFqm0
On Huzzah used Progmem: 21% and 44% of dyn RAM,
that means there is plenty of space left for the HTML page.
Sorry @Juergen_Bruegl I would love too but not at this time. Too busy with other projects. I do have a plan for a pixel project real soon so I can come back to this in about a month or soo when I get the parts.