/*
  Activity 7: Light Sequence
  Purpose: Create a visually appealing LED sequence
  LEDs turn on one by one going up (1→2→3→4→5)
  Then reverse going down (5→4→3→2→1)
  Perfect for animations and visual feedback
  
  Components:
  - ESP32 Dev Module
  - 5 LEDs connected to GPIO 18, 19, 21, 22, 23
  - 5 × 220Ω current-limiting resistors
*/

int leds[] = {18, 19, 21, 22, 23};
int cantidadLeds = 5;

void setup() {
  for (int i = 0; i < cantidadLeds; i++) {
    pinMode(leds[i], OUTPUT);
    digitalWrite(leds[i], LOW);
  }
}

void loop() {
  // Going UP: LED 1 to LED 5
  for (int i = 0; i < cantidadLeds; i++) {
    digitalWrite(leds[i], HIGH);
    delay(200);
    digitalWrite(leds[i], LOW);
  }
  
  // Going DOWN: LED 5 to LED 1
  for (int i = cantidadLeds - 1; i >= 0; i--) {
    digitalWrite(leds[i], HIGH);
    delay(200);
    digitalWrite(leds[i], LOW);
  }
}