int ir=4;
int led1=5;
int led2=6;
void setup()
{
pinMode(ir, INPUT);  
pinMode(led1, OUTPUT);
pinMode(led2, OUTPUT);
}

void loop() 
{
int ir_val=digitalRead(ir);
Serial.println(ir_val);
if (ir_val==1)
{
digitalWrite(led1,HIGH); 
digitalWrite(led2,LOW); 
}  
else
{
digitalWrite(led1,LOW);
digitalWrite(led2, HIGH);  
}
}