#include < FastLED.h>
            #define LED_PIN 3
            #define NUM_LEDS 30
            #define BRIGHTNESS 255
            #define LED_TYPE WS2811
            #define COLOR_ORDER RGB
            CRGB leds[NUM_LEDS];
            
            int pirPin = 2;
            
            int pirState = LOW;
            int val = 0;
            
            void setup() {
              pinMode(pirPin, INPUT);
              Serial.begin(9600);
              FastLED.addLeds< LED_TYPE, LED_PIN, COLOR_ORDER>(leds, NUM_LEDS);
              FastLED.setBrightness(BRIGHTNESS);
            }
            
            void loop() {
              val = digitalRead(pirPin);
              
              if (val == HIGH) {
                if (pirState == LOW) {
                  Serial.println("Bewegung erkannt!");
                  for(int i = 0; i < NUM_LEDS; i++){
                    if(i % 3 == 2){
                      leds[i] = CRGB(0,0,255);
                    }else{
                      leds[i] = CRGB(255,0,0);
                    }
                    FastLED.show();
                    delay(700);
                  }
            
                  pirState = HIGH;
                }
              } else {
                if (pirState == HIGH) {
                  Serial.println("Keine Bewegung.");
                  
                  delay(2500);
                  fill_solid(leds, NUM_LEDS, CRGB::Black);
                  FastLED.show();
                  
                  pirState = LOW;
                }
              }
            }