nt led = 13; // the pin that the LED is atteched to
int sensor = 2; // the pin that the sensor is atteched to
int state = LOW; 
int val = 0; 
void setup() {
 pinMode(led, OUTPUT); 
 pinMode(sensor, INPUT); 
 Serial.begin(9600);
 
void loop(){
 val = digitalRead(sensor); // read sensor value
 if (val == HIGH) { // check if the sensor is HIGH
 digitalWrite(led, HIGH); // turn LED ON
 delay(500); // delay 100 milliseconds 
 
 if (state == LOW) {
 Serial.println("Motion detected!"); 
 state = HIGH; // update variable state to HIGH
 }
 } 
 else {
 digitalWrite(led, LOW); // turn LED OFF
 delay(500); // delay 200 milliseconds 
 
 if (state == HIGH){
 Serial.println("Motion stopped!");
 state = LOW; // update variable state to LOW
 }
 }
}