#include <Servo.h>;
  Servo myServo; 
  int buttonPin = 2;
  int counter = 0;

void setup()
{
  myServo.attach(9);
  pinMode(buttonPin, INPUT);
}


void loop()
{
  int buttonState;  
  buttonState = digitalRead(buttonPin);


  if (buttonState == HIGH) 
  {
    counter++;
    delay(0);
  }

  if(counter == 1)
    myServo.write (0);  
  else if(counter == 2)
    myServo.write (90);
  else if(counter == 3)
    myServo.write (180); 
  else if(counter == 4)  
    myServo.write (180);
  else if(counter == 5)
    myServo.write (90);
  else if(counter == 6)
    myServo.write (0);
  else
   counter = 0;
}