int KUNING2 = 8;
int MERAH1 = 12;
int HIJAU3 = 4;
void setup() 
{
pinMode (KUNING2,OUTPUT);
pinMode (MERAH1,OUTPUT);
pinMode (HIJAU3,OUTPUT);
}
void loop() 
{
digitalWrite(KUNING2,LOW);
digitalWrite(MERAH1,HIGH);
digitalWrite(HIJAU3,LOW);
delay (500);
digitalWrite(KUNING2,HIGH);
digitalWrite(MERAH1,LOW);
digitalWrite(HIJAU3,LOW);
delay (200);
digitalWrite(KUNING2,LOW);
digitalWrite(MERAH1,LOW);
digitalWrite(HIJAU3,HIGH);
delay (100);
}