The WeMos D1 Mini (ESP8266) on a tripler base together with a WeMos button shield and a WeMos 64x48 OLED shield . . .
. . . the three dupont wires from 5V, GND & D4 are connected to a WS8212B 8x8 (NeoPixel) Matrix of 64 RGB LEDs
See links here (https://docs.wemos.cc/en/latest/d1/d1_mini.html# & https://docs.wemos.cc/en/latest/d1_mini_shiled/index.html) for more details on the board/shields . . . they are available from all the usual sources (eBay, Amazon, Aliexpress etc) for very little money ($9 all in from Aliexpress using the ‘Buy it’ links on the each of the relevant pages from the WeMos.cc site above)