#include <Adafruit_NeoPixel.h>
#include <math.h>

#define PIN_WS2812B 13
#define NUM_COLS 16
#define NUM_ROWS 16  // The ESP32 pin GPIO16 connected to WS2812B
#define NUM_PIXELS NUM_COLS * NUM_ROWS   // The number of LEDs (pixels) on WS2812B LED strip
#define Button1 7

int counter1 = 0;

Adafruit_NeoPixel ws2812b(NUM_PIXELS, PIN_WS2812B, NEO_GRB + NEO_KHZ800);

void count(){

  counter1 = digitalRead(Button1);      // ... wird der TasterStatus neu definiert ("volatile"). Die neue Definition geschieht durch das Auslesen des Tasters an Pin 2. ...
  digitalWrite(LED_BUILTIN, counter1);

}


void setup() {
  pinMode (PIN_WS2812B, OUTPUT);

  pinMode(Button1, INPUT);

  attachInterrupt(0, count, CHANGE);


 // ws2812b.begin();  // initialize WS2812B strip object (REQUIRED)



}




void loop() {



}