Servo

#include <Servo.h>
Servo myservo;

#define button 4  // Der Taster ist auf Pin 4

int pos = 30;    // IST_Wert des Servos
bool lastKey = LOW;

void setup()
{
  myservo.attach(5);  // Der Servo ist auf Pin 5
  pinMode(pos, OUTPUT);
  pinMode(button, INPUT_PULLUP);
}

void loop() {
  if (digitalRead(button) == HIGH && lastKey == LOW) {
    for (pos = 30; pos <= 70; pos += 70) {
      myservo.write(pos);
      delay(10);
    }
    lastKey = HIGH;
  }

  if (digitalRead(button) == LOW && lastKey == HIGH) {
    for (pos = 70; pos >= 30; pos -= 70) {
      myservo.write(pos);
      delay(270);
    }
    lastKey = LOW;
  }
}