#include <Adafruit_NeoPixel.h>

#define NUMPIXELS        1  // number of neopixels (single)
#define PIN_NEOPIXEL     6  // for emulator or Pico

Adafruit_NeoPixel pixels(NUMPIXELS, PIN_NEOPIXEL, NEO_GRB + NEO_KHZ800);

void setup() {
  pixels.begin();           // initialize neopixel(s)
}

void loop() {
  pixels.fill( pixels.Color(200, 200, 0) );
  pixels.setBrightness(random(10,255));   
  pixels.show();
  delay(1000);
  pixels.fill( pixels.Color(200, 0, 200) );
  pixels.setBrightness(random(10,255));    
  pixels.show();
  delay(1000);
  pixels.fill( pixels.Color(random(10, 255), random(10, 255), random(10, 255)) );
  pixels.setBrightness(255);    
  pixels.show();
  delay(1000);
}