#include <EEPROM.h>

// Define pin numbers for LEDs
const int led1 = 2;
const int led2 = 3;
const int led3 = 4;

// Define pin numbers for increase/decrease buttons (LED 1)
const int buttonInc1 = 8;
const int buttonDec1 = 9;

// Define pin numbers for increase/decrease buttons (LED 2)
const int buttonInc2 = 10;
const int buttonDec2 = 11;

// Define pin numbers for increase/decrease buttons (LED 3)
const int buttonInc3 = 12;
const int buttonDec3 = 13;

// Initial durations (in milliseconds) for each LED
int duration1 = 1000; // Default duration for LED 1
int duration2 = 1000; // Default duration for LED 2
int duration3 = 1000; // Default duration for LED 3

// EEPROM addresses for storing durations
const int addrDuration1 = 0;
const int addrDuration2 = 1;
const int addrDuration3 = 2;

void setup() {
  // Initialize LED pins as outputs
  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
  pinMode(led3, OUTPUT);

  // Initialize increase/decrease button pins as inputs with pull-up resistors
  pinMode(buttonInc1, INPUT_PULLUP);
  pinMode(buttonDec1, INPUT_PULLUP);
  pinMode(buttonInc2, INPUT_PULLUP);
  pinMode(buttonDec2, INPUT_PULLUP);
  pinMode(buttonInc3, INPUT_PULLUP);
  pinMode(buttonDec3, INPUT_PULLUP);

  // Retrieve durations from EEPROM
  duration1 = EEPROM.read(addrDuration1);
  duration2 = EEPROM.read(addrDuration2);
  duration3 = EEPROM.read(addrDuration3);

  // Set initial LED durations
  digitalWrite(led1, HIGH);
  delay(duration1);
  digitalWrite(led1, LOW);
  digitalWrite(led2, HIGH);
  delay(duration2);
  digitalWrite(led2, LOW);
  digitalWrite(led3, HIGH);
  delay(duration3);
  digitalWrite(led3, LOW);
}

void loop() {
  // Update durations based on button presses
  updateDurations();
}

void updateDurations() {
  // Update duration for LED 1
  if (digitalRead(buttonInc1) == LOW && duration1 < 20000) {
    duration1 += 1000; // Increase duration by 100 milliseconds
    saveDurationsToEEPROM();
  } else if (digitalRead(buttonDec1) == LOW && duration1 > 1000) {
    duration1 -= 1000; // Decrease duration by 100 milliseconds
    saveDurationsToEEPROM();
  }

  // Update duration for LED 2
  if (digitalRead(buttonInc2) == LOW && duration2 < 20000) {
    duration2 += 1000; // Increase duration by 100 milliseconds
    saveDurationsToEEPROM();
  } else if (digitalRead(buttonDec2) == LOW && duration2 > 1000) {
    duration2 -= 1000; // Decrease duration by 100 milliseconds
    saveDurationsToEEPROM();
  }

  // Update duration for LED 3
  if (digitalRead(buttonInc3) == LOW && duration3 < 20000) {
    duration3 += 1000; // Increase duration by 100 milliseconds
    saveDurationsToEEPROM();
  } else if (digitalRead(buttonDec3) == LOW && duration3 > 1000) {
    duration3 -= 1000; // Decrease duration by 100 milliseconds
    saveDurationsToEEPROM();
  }

  // Display the sequence with updated durations
  digitalWrite(led1, HIGH);
  delay(duration1);
  digitalWrite(led1, LOW);
  digitalWrite(led2, HIGH);
  delay(duration2);
  digitalWrite(led2, LOW);
  digitalWrite(led3, HIGH);
  delay(duration3);
  digitalWrite(led3, LOW);
}

void saveDurationsToEEPROM() {
  EEPROM.write(addrDuration1, duration1);
}