#include <Servo.h>

Servo myServo;  

void setup() {
  myServo.attach(9);  //Servo 
  myServo.write(0);   
  pinMode(6, INPUT);  // motion sensor
  Serial.begin(9600); // baud
}

void loop() {
  int motion = digitalRead(6);  

  if (motion == HIGH) {
    Serial.println("Motion detected");
    myServo.write(180);  
    delay(2000);         
    myServo.write(0);    
    delay(2000);         
  } else {
    Serial.println("No motion detected");
  }

  delay(2000);  
}