У вашего броузера проблема в совместимости с HTML5
Get your PCBs fabricated professionally from JLCPCB for just 2$ https://jlcpcb.com/
I recently came across an LED Cube by Greg Davill. It's a great piece of artwork. Getting inspired by it, even I wanted to make something like that. But this one was way out of my league. I decided to take one step at a time and made a way smaller version of LED Cube as a Mood Lamp. It can be a good starting point to learn about the hardware, which is mostly LEDs and microcontrollers, and software to control them (creating animations).
In this video, I will show you how I made an LED Cube using the popular WS2812 LEDs.
Instructables: https://www.instructables.com/id/LED-Mood-Lamp/
WS2812E: https://lcsc.com/product-detail/Light-Emitting-Diodes-LED_Worldsemi-WS2812E_C139127.html