int led1 = 13;
int led2 = 12;
int led3 = 11;
int led4 = 10;
int led5 = 9;
int led6 = 8;

void setup() {
  Serial.begin(9600);
  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
  pinMode(led3, OUTPUT);
  pinMode(led4, OUTPUT);
  pinMode(led5, OUTPUT);
  pinMode(led6, OUTPUT);
  Serial.println("Ready...");
  delay(2000);
  showMainMenu();
}

void loop() {
  if (Serial.available() > 0) {
    char inChar = (char)Serial.read();
    handleMainMenu(inChar);
  }
}

void showMainMenu() {
  Serial.println("Main Menu:");
  Serial.println("1. LED 1");
  Serial.println("2. LED 2");
  Serial.println("3. LED 3");
  Serial.println("4. LED 4");
  Serial.println("5. LED 5");
  Serial.println("6. LED 6");
  Serial.println("Select a number to control an LED:");
}

void handleMainMenu(char choice) {
  switch (choice) {
    case '1': patern1(); break;
    case '2': patern2(); break;
    case '3': patern3(); break;
    case '4': patern4(); break;
    case '5': patern5(); break;
    case '6': patern6(); break;
    //default: Serial.println("Invalid option. Try again."); 
    delay(3000); showMainMenu(); break;
  }
}

void patern1() {
  Serial.println("LED1 MENU");
  Serial.println("A. ON LED");
  Serial.println("B. OFF LED");
  Serial.println("--------------");
  controlLED(led1, 'A', 'B');
}

void patern2() {
  Serial.println("LED2 MENU");
  Serial.println("C. ON LED");
  Serial.println("D. OFF LED");
  Serial.println("--------------");
  controlLED(led2, 'C', 'D');
}

void patern3() {
  Serial.println("LED3 MENU");
  Serial.println("E. ON LED");
  Serial.println("F. OFF LED");
  Serial.println("--------------");
  controlLED(led3, 'E', 'F');
}

void patern4() {
  Serial.println("LED4 MENU");
  Serial.println("G. ON LED");
  Serial.println("H. OFF LED");
  Serial.println("--------------");
  controlLED(led4, 'G', 'H');
}

void patern5() {
  Serial.println("LED5 MENU");
  Serial.println("I. ON LED");
  Serial.println("J. OFF LED");
  Serial.println("--------------");
  controlLED(led5, 'I', 'J');
}

void patern6() {
  Serial.println("LED6 MENU");
  Serial.println("K. ON LED");
  Serial.println("L. OFF LED");
  Serial.println("--------------");
  controlLED(led6, 'K', 'L');
}

void controlLED(int led, char onChar, char offChar) {
  while (true) {
    while (Serial.available() == 0) {}  // Wait for user input

    char inChar = (char)Serial.read();
    if (inChar == onChar) {
      digitalWrite(led, HIGH);
      Serial.println("ON");
      delay(2000);
      showMainMenu();
      return;
    } else if (inChar == offChar) {
      digitalWrite(led, LOW);
      Serial.println("OFF");
      delay(2000);
      showMainMenu();
      return;
     } //else {
    //   while (Serial.available() > 0) Serial.read(); // Clear the buffer
    //   Serial.println(" Try again.");
    // }
  }
}