const int numLED = 4; //menginisialisasikan jumlah LED
const int pinLED[numLED] ={2, 4, 6, 8}; //menginisisalisasikan pin pin LED
void setup() {
for(int i=0; i<4; i++) //
{
pinMode(pinLED[i], OUTPUT);
}
}
void loop() {
for(int i=0; i<4; i++)
{
digitalWrite(pinLED[i], HIGH);
delay(500);
}
for(int i=4; i>0; i--)
{
digitalWrite(pinLED[i], LOW);
delay(500);
}
}