#include <Servo.h> 
// Declare the Servo pin 
int servoPin = 13; 
int sensor = 12;              // the pin that the sensor is atteched to
int state = LOW;             // by default, no motion detected
int val = 0; 
// Create a servo object 
Servo Servo1; 
void setup() { 
   // We need to attach the servo to the used pin number 
   Servo1.attach(servoPin);
   pinMode(sensor, INPUT);    // initialize sensor as an input
  Serial.begin(9600); 
}
void loop(){ 
val = digitalRead(sensor);   // read sensor value
  if (val == HIGH) {           // check if the sensor is HIGH
    Servo1.write(180);   // turn LED ON
    delay(100);                // delay 100 milliseconds 
    
    if (state == LOW) {
      Serial.println("Motion detected!"); 
      state = HIGH;       // update variable state to HIGH
    }
  } 
  else {
      Servo1.write(90); // turn LED OFF
      delay(200);             // delay 200 milliseconds 
      
      if (state == HIGH){
        Serial.println("Motion stopped!");
        state = LOW;       // update variable state to LOW
    }
  }
}