void setup() {pinMode(7, INPUT); Serial.begin(9600); pinMode(13, OUTPUT);
  // put your setup code here, to run once:

}

void loop() {Serial.print("IRSensorip");Serial.print(digitalRead(7));
if(digitalRead(7)==0)  // put your main code here, to run repeatedly:

{
digitalWrite(13, HIGH);
}
else{
digitalWrite(13, LOW);
}
}