#define led 5
#define ir 6
void setup() {
  // put your setup code here, to run once:
pinMode(ir, INPUT);
pinMode(led, OUTPUT);
}

void loop() {
  int data = digitalRead(ir);
  if(data == 0)
  {
   digitalWrite(led, HIGH);
  }
  else
  {
   digitalWrite(led,LOW);
  }
}