void setup()
{
  pinMode (2,INPUT);           //IR Sensor 1
  pinMode (3,INPUT);           //IR Sensor 2
  pinMode (4,INPUT);           //IR Sensor 3
  pinMode (5,OUTPUT);          //LED 1
  pinMode (6,OUTPUT);          //LED 2
  pinMode (7,OUTPUT);          //LED 3
}
void loop()
{
  if (digitalRead(2)==HIGH&&digitalRead(3)==HIGH&&digitalRead(4)==HIGH)
  {
    digitalWrite(5,HIGH);
    digitalWrite(6,HIGH);
    digitalWrite(7,HIGH);
  }
  else if (digitalRead(2)==HIGH&&digitalRead(3)==HIGH)
  {
    digitalWrite(5,HIGH);
    digitalWrite(6,HIGH);
    digitalWrite(7,LOW);
  }
  else if (digitalRead(3)==HIGH&&digitalRead(4)==HIGH)
  {
    digitalWrite(5,LOW);
    digitalWrite(6,HIGH);
    digitalWrite(7,HIGH);
  }
  else if (digitalRead(2)==HIGH&&digitalRead(4)==HIGH)
  {
    digitalWrite(5,HIGH);
    digitalWrite(6,LOW);
    digitalWrite(7,HIGH);
  }
  else if (digitalRead(2)==HIGH)
  {
    digitalWrite(5,HIGH);
    digitalWrite(6,LOW);
    digitalWrite(7,LOW);
  }
  else if(digitalRead(3)==HIGH)
  {
    digitalWrite(5,LOW);
    digitalWrite(6,HIGH);
    digitalWrite(7,LOW);
  }
  else if(digitalRead(4)==HIGH)
  {
    digitalWrite(5,LOW);
    digitalWrite(6,LOW);
    digitalWrite(7,HIGH);
  }
  else
  {
    digitalWrite(6,LOW);
    digitalWrite(7,LOW);
    digitalWrite(5,LOW);
  }
}