int ledm = 4;
int ledk = 6;
int ledh = 7;
void setup() {
  Serial.begin(9600);
  pinMode (ledm, OUTPUT);
  pinMode (ledk,  OUTPUT);
  pinMode (ledh, OUTPUT);

}

void loop(){
  digitalWrite(ledm,HIGH);
  digitalWrite(ledk,LOW);
  digitalWrite(ledh,LOW);
  Serial.print ("MERAH MENYALA");
  delay (300);

}