int ledBiru = 2;
int ledHijau = 5;
int ledKuning = 7;
void setup() {
pinMode(ledBiru, OUTPUT);
pinMode(ledHijau, OUTPUT);
pinMode(ledKuning, OUTPUT);
}
void loop() {
digitalWrite (ledBiru,HIGH);
digitalWrite (ledHijau,LOW);
digitalWrite (ledKuning,LOW);
delay (1000);
digitalWrite (ledBiru, HIGH);
digitalWrite (ledHijau, HIGH);
digitalWrite (ledKuning, LOW);
delay (1000);
digitalWrite (ledBiru, HIGH);
digitalWrite (ledHijau, LOW);
digitalWrite (ledKuning, HIGH);
delay (1000);
}