int pin = 2;
int led = 4;
int led2 = 5;
int toestand;
int teller;

void setup() 
{
  pinMode (pin, INPUT);
  pinMode (led, OUTPUT);
  pinMode (led2, OUTPUT);
  attachInterrupt(pin, wissel, RISING);
}

void wissel()
{
//Toggle the LED
digitalWrite (led,!digitalRead(led));
}

void loop() 
{
  Serial.println(teller);
  delay (100);
  digitalWrite(led2, HIGH);
  delay(1000);
  digitalWrite(led2, LOW);
  delay(500);
  digitalWrite(led2, HIGH);
  delay(1000);
  digitalWrite(led2, LOW);
  delay(500);
  digitalWrite(led2, HIGH);
  delay(1000);
  digitalWrite(led2, LOW);
  delay(500);
}