LED BAR GRAPH

// LED Bar Graph — Knight Rider chaser
const int NUM_LEDS = 10;
const int PINS[NUM_LEDS] = {2, 3, 4, 5, 6, 7, 8, 9, 10, 11};

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

void loop() {
  // Sweep forward
  for (int i = 0; i < NUM_LEDS; i++) {
    digitalWrite(PINS[i], HIGH);
    delay(60);
    digitalWrite(PINS[i], LOW);
  }
  // Sweep backward
  for (int i = NUM_LEDS - 2; i > 0; i--) {
    digitalWrite(PINS[i], HIGH);
    delay(60);
    digitalWrite(PINS[i], LOW);
  }
}