//Cortez, Shara Joy
//NW-301

// Define LED pins
const int led1 = 2;
const int led2 = 3;
const int led3 = 4;
const int led4 = 5;
const int led5 = 6;

void setup() {
    // Set all LED pins as OUTPUT
    pinMode(led1, OUTPUT);
    pinMode(led2, OUTPUT);
    pinMode(led3, OUTPUT);
    pinMode(led4, OUTPUT);
    pinMode(led5, OUTPUT);
}

void loop() {
    // Transition 1: All LEDs on and then off
    digitalWrite(led1, HIGH);
    digitalWrite(led2, HIGH);
    digitalWrite(led3, HIGH);
    digitalWrite(led4, HIGH);
    digitalWrite(led5, HIGH);
    delay(1000); // LEDs ON for 1 second
    
    digitalWrite(led1, LOW);
    digitalWrite(led2, LOW);
    digitalWrite(led3, LOW);
    digitalWrite(led4, LOW);
    digitalWrite(led5, LOW);
    delay(1000); // LEDs OFF for 1 second

    // Transition 2: Sequentially turn LEDs on and off
    for (int i = led1; i <= led5; i++) {
        digitalWrite(i, HIGH); // Turn LED ON
        delay(500);            // Wait for 0.5 seconds
    }
    
    for (int i = led1; i <= led5; i++) {
        digitalWrite(i, LOW);  // Turn LED OFF
        delay(500);            // Wait for 0.5 seconds
    }

    // Transition 3: One by one, turn ON and OFF
    for (int i = led1; i <= led5; i++) {
        digitalWrite(i, HIGH); // Turn LED ON
        delay(500);            // Wait for 0.5 seconds
        digitalWrite(i, LOW);  // Turn LED OFF
        delay(500);            // Wait for 0.5 seconds
    }
}