//definisi variabel
#define ledm 2
#define ledk 3
#define ledh 4
//persiapan awal
void setup() {
  pinMode (ledm, OUTPUT);
  pinMode (ledk, OUTPUT);
  pinMode (ledh, OUTPUT);
}
//program yang dijalankan terus-menerus
void loop() {
  digitalWrite(ledm, HIGH);
  digitalWrite(ledk, LOW);
  digitalWrite(ledh, LOW);
  delay(1000);
  digitalWrite(ledm, LOW);
  digitalWrite(ledk, HIGH);
  digitalWrite(ledh, LOW);
  delay(1000);
  digitalWrite(ledm, LOW);
  digitalWrite(ledk, LOW);
  digitalWrite(ledh, HIGH);
  delay(1000);
}