void setup() { 
  pinMode(5, OUTPUT); 
  pinMode(15, INPUT); 
} 
 void loop() { 
  if(digitalRead(15) == HIGH){
     Serial.println("Button ditekan-LED=ON");
      digitalWrite(5, HIGH);
     } else { 
  
  
  
  
  
  
  
  
  digitalWrite(5, LOW); }
}