int s;
void setup() {
  // put your setup code here, to run once:
pinMode(4,INPUT);
Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:
int a=digitalRead(4);
if(a==1){
  Serial.println("Motion detected");
  delay(2000);
}
else{
  Serial.println("No detected motion");
  delay(2000);

}
}