here is my setup.
an electric projector screen with a diagonal of 199 cm.
396 WS2812b LEDs are installed, 96 LEDs each on the left and right on one meter, 103 LEDs on the top and bottom on two meters.
The software runs on a Raspberry 3B+ with an Arduino Nano.
The screen can be moved in and out.
There are several clips on Youtube on my channel