const int jumlahLed = 10;
int pinLed[jumlahLed] = {25, 33, 32, 27, 26, 23, 22, 21, 19, 18}; 

void setup() {
  for (int i = 0; i < jumlahLed; i++) pinMode(pinLed[i], OUTPUT);
}

void loop() {
  for (int i = 0; i < jumlahLed; i++) digitalWrite(pinLed[i], LOW);
  delay(200);
  
  for (int i = 0; i <= jumlahLed / 2; i++) {
    for (int j = 0; j < jumlahLed; j++) digitalWrite(pinLed[j], LOW);
    if (4 - i >= 0) digitalWrite(pinLed[4 - i], HIGH);
    if (5 + i < jumlahLed) digitalWrite(pinLed[5 + i], HIGH);
    delay(150);
  }
  delay(100);
}