int relay=12;
int on=3;
int off=4;

void setup(){
  pinMode(relay,OUTPUT);
  pinMode(on,INPUT);
  pinMode(off,INPUT);
}

void loop(){
  if(digitalRead(on)==HIGH)
  {
    digitalWrite(relay,HIGH);
    Serial.println("nyala");
  }
  
  if(digitalRead(off)==HIGH)
  {
    digitalWrite(relay,LOW);
    Serial.println("mati");
  }
  
}