// Define the pins for the LEDs
const int redPin = 2;
const int greenPin = 4;
const int yellowPin = 6;
const int orangePin = 8;
const int violetPin = 10;

void setup() {
  // Set the LED pins as output
  pinMode(redPin, OUTPUT);
  pinMode(greenPin, OUTPUT);
  pinMode(yellowPin, OUTPUT);
  pinMode(orangePin, OUTPUT);
  pinMode(violetPin, OUTPUT);
}

void loop() {
  // Chase in one direction
  for (int i = 0; i < 5; i++) {
    digitalWrite(i*2 + 2, HIGH); // Turn on the LED
    delay(100); // Wait for 100ms
    digitalWrite(i*2 + 2, LOW); // Turn off the LED
  }
  // Chase in the other direction
  for (int i = 4; i >= 0; i--) {
    digitalWrite(i*2 + 2, HIGH); // Turn on the LED
    delay(100); // Wait for 100ms
    digitalWrite(i*2 + 2, LOW); // Turn off the LED
  }
}