#include <OneButton.h>
#define Taster 0

OneButton Taster1(Taster, false);
bool TasterZustand = false;

void setup()
{
  // put your setup code here, to run once:
pinMode(Taster, INPUT);
pinMode(1, OUTPUT);
Taster1.attachClick(Ein_Click);
}

void loop() 
{
 Taster1.tick();
 digitalWrite(1, TasterZustand);
 
}
void Ein_Click()
{
  TasterZustand =! TasterZustand;
}