#include <Adafruit_NeoPixel.h>

#define NUMPIXELS        1  // number of neopixels (single) 
#define PIN_NEOPIXEL     6  // for emulator or Pico, auf welchem Pin gesetzt

Adafruit_NeoPixel pixels(NUMPIXELS, PIN_NEOPIXEL, NEO_GRB + NEO_KHZ800); //Farbe und Geschwindigkeit

void setup() {
  pixels.begin();           // initialize neopixel(s)
  pixels.setBrightness(20); // set brightness (0 low, 255 high)
  pixels.fill( pixels.Color(255, 0, 100) );    // set pixel color (RGB magenta)
  pixels.show();            // show pixels (necessary!)
}

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