int ir = 4 ;
    int led = A1 ;
    int led1 = A3 ;
    
    void setup () {
    pinMode (ir , INPUT_PULLUP);
    pinMode (led , OUTPUT);
    pinMode(led1,OUTPUT);
   Serial.begin(9600);
  }
    void loop() {
    digitalWrite(ir,HIGH);
    int x=digitalRead (ir);
    Serial.print ("ir:");
    Serial.println (x);
    if(x==0)
  { 
   digitalWrite(led,HIGH);
    digitalWrite(led1,HIGH);
    delay (1000);
  }
  else
 {
    digitalWrite(led,LOW);
    digitalWrite(led1,LOW);
    delay (1000);
  }
  }