int Led = 9 ;
int tombolApin = 8 ;
int tombolBpin = 7 ;

byte led = 0 ;

 void setup () 
{
  pinMode(led, OUTPUT);
  pinMode(tombolApin, INPUT_PULLUP);  
  pinMode(tombolBpin, INPUT_PULLUP);  
}

 void loop () 
{
  if (digitalRead(tombolApin) == LOW)
  {
    digitalWrite(Led, HIGH);
  }
  if (digitalRead(tombolBpin) == LOW)
  {
    digitalWrite(Led, LOW);
  }
}