Navigate to https://www.arduino.cc/en/software and download the 2.0 rc version appropriate for your system. Run the installer once it is down
follow the instructions at https://www.ardu-badge.com/FastLED
https://www.arduino.cc/reference/en/libraries/buttonfever/
https://github.com/earlephilhower/ESP8266Audio Same instructions as FastLed