//By NMD Weerasinghe SLCOTM
// this is without parameter passing
// you need to define many functions asssigning values for each cases

void setup() {
 pinMode(1, OUTPUT);
  pinMode(2, OUTPUT);
  
}

void loop() {

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


}

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

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

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

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