void setup() {
  // put your setup code here, to run once:
pinMode(7, OUTPUT);
pinMode(6, OUTPUT);
pinMode(5, OUTPUT);
Serial.begin(9600);
Serial.println("hi");
}

void loop() {
  // put your main code here, to run repeatedly:

if(Serial.available())
{
  int scan=Serial.parseInt();

  if(scan>=0 && scan<=333)
  {
    digitalWrite(7,HIGH);
    digitalWrite(6,LOW);
    digitalWrite(5,LOW);
  }
  else if(scan>333 && scan<=666)
  {
    digitalWrite(7,LOW);
    digitalWrite(6,HIGH);
    digitalWrite(5,LOW);
  }
  else 
  {
    digitalWrite(7,LOW);
    digitalWrite(6,LOW);
    digitalWrite(5,HIGH);
  }
  delay(3000);
}


}