//By NMD Weerasinghe SLCOTM
// this is without parameter passing
// you need to define many functions asssigning values for each cases
//here we 'll make a function to tun on any LED we want 
//and another Function to Turn off any LED




void setup() {
pinMode(1, OUTPUT);
pinMode(2, OUTPUT);
Serial.begin(9600);

}

void loop() {

  LED_ON(1);
  delay(1000);
  LED_ON(2);
  delay(1000);
  LED_ON(3);
  delay(1000);

  LED_OFF(3);
  delay(1000);
  LED_OFF(1);
  delay(1000);
  LED_OFF(2);
  delay(1000);




 /* 
  LED1_ON();
  delay(1000);
  LED2_ON();
  delay(1000);
  LED1_OFF();
  delay(1000);
  LED2_OFF();
  delay(1000);
  */

}

void LED_ON( int LED_NUM)// tur on any led
{
  digitalWrite(LED_NUM + 1, HIGH);
}

void LED_OFF( int LED_NUM )// tur on any led
{
  digitalWrite(LED_NUM + 1, LOW);
}



/*

void LED1_ON()
{
  digitalWrite(2, HIGH);
}

void LED2_ON()
{
  digitalWrite(3, HIGH);
}

void LED1_OFF()
{
  digitalWrite(2, LOW);
}

void LED2_OFF()
{
  digitalWrite(3, LOW);
}

*/