int ir=6;
int ledr=4;
int ledg=2;

void setup()
{
pinMode(ir, INPUT);
pinMode(ledr, OUTPUT);
pinMode(ledg, OUTPUT);
Serial.begin(9600);
}

void loop()
{
int ir_val=digitalRead(ir);
Serial.println(ir_val);
if(ir_val==1)
{
digitalWrite(ledg,HIGH);
digitalWrite(ledr,LOW);
Serial.println("sensor is detected");


}
else
{
digitalWrite(ledg,HIGH);
digitalWrite(ledr,LOW);
Serial.println("WELCOME");
}
}