#include <Adafruit_NeoPixel.h>

#define LED_PIN     6
#define NUM_LEDS    30

Adafruit_NeoPixel strip = Adafruit_NeoPixel(NUM_LEDS, LED_PIN, NEO_GRB + NEO_KHZ800);

void setup() {
  strip.begin();
  strip.fill(strip.Color(0, 0, 0), 0, NUM_LEDS);  // Alle LEDs auf Schwarz setzen
  strip.show();
  strip.setBrightness(200);
}

void loop() {
  rainbowCycle(5);
}

void rainbowCycle(uint8_t wait) {
  for (int j = 0; j < 256; j++) { 
    for (int i = 0; i < strip.numPixels(); i++) {
      strip.setPixelColor(i, Wheel((i + j) & 255));
    }
    strip.show();
    delay(wait);
  }
}

uint32_t Wheel(byte WheelPos) {
  WheelPos = 255 - WheelPos;
  if (WheelPos < 85) {
    return strip.Color(255 - WheelPos * 3, 0, WheelPos * 3);
  }
  if (WheelPos < 170) {
    WheelPos -= 85;
    return strip.Color(0, WheelPos * 3, 255 - WheelPos * 3);
  }
  WheelPos -= 170;
  return strip.Color(WheelPos * 3, 255 - WheelPos * 3, 0);
}