#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);

void setup() {
  lcd.init();
  lcd.backlight();
  
  randomSeed(analogRead(0));  // Initialize random seed
}

void loop() {
  lcd.clear();

  // Characters for the strings
  char kelompok[] = "Kelompok 6";
  char setya[] = "Setya";
  char puji[] = "Pujiraharjo";

  // Print "Kelompok 6" with randomized character positions
  randomizeAndPrint(kelompok, 10, 0);  // 10 is the length of "Kelompok 6"
  delay(1000);  // Pause after "Kelompok 6"
  
  lcd.clear();

  // Print "Setya" with randomized character positions
  randomizeAndPrint(setya, 5, 0);  // 5 is the length of "Setya"
  delay(1000);  // Pause after "Setya"
  

  // Print "Pujiraharjo" with randomized character positions
  randomizeAndPrint(puji, 11, 1);  // 11 is the length of "Pujiraharjo"
  delay(1000);  // Pause after "Pujiraharjo"
  
  lcd.clear();
}

// Function to randomize the display of characters in the string
void randomizeAndPrint(char* text, int length, int row) {
  // Create an array to store the shuffled positions
  int positions[length];
  
  // Initialize the positions array with sequential numbers
  for (int i = 0; i < length; i++) {
    positions[i] = i;
  }

  // Shuffle the positions array using Fisher-Yates algorithm
  for (int i = length - 1; i > 0; i--) {
    int j = random(0, i + 1);
    int temp = positions[i];
    positions[i] = positions[j];
    positions[j] = temp;
  }

  // Print the characters in random positions
  for (int i = 0; i < length; i++) {
    lcd.setCursor(positions[i], row);  // Set the cursor to the random position
    lcd.print(text[positions[i]]);  // Print the character at that position
    delay(random(200, 400));  // Random delay between printing each character
  }
}