#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64

#define OLED_RESET    -1 // Reset pin not used
#define SCREEN_ADDRESS 0x3C // I2C address for the OLED display

Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

int cursorX = 0;
int cursorY = 0;

//char character = "MC";
void oledSetup(){
  // SSD1306_SWITCHCAPVCC = generate display voltage from 3.3V internally
  if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) { // Address 0x3C for 128x32
    Serial.begin(9600);
    Serial.println(F("SSD1306 allocation failed"));
    for(;;); // Don't proceed, loop forever
  }
  // Draw a single pixel in white
  display.drawPixel(10, 10, SSD1306_WHITE);
  display.display();
  
  display.clearDisplay();
  display.setTextSize(1);
  display.setTextColor(SSD1306_WHITE);
  display.setCursor(0, 0);
  display.println("Welcome Ari");
  display.display();
}
void setup() {
  oledSetup();
  delay(500);
  display.clearDisplay();
  display.setTextSize(1);
  display.setTextColor(SSD1306_WHITE);
  display.setCursor(0, 0);
  display.drawPixel(10, 10, SSD1306_WHITE);
  display.display();
  pinMode(2, INPUT_PULLUP);
  pinMode(3, INPUT_PULLUP);
  pinMode(4, INPUT_PULLUP);
  pinMode(5, INPUT_PULLUP);
}

void loop() {
  if (digitalRead(2) == LOW) { // Tombol D2 (kiri) ditekan
    cursorX = cursorX - 5;
    display.clearDisplay();
    display.setCursor(cursorX, cursorY);
    display.println("character");
    display.display();
    delay(100);
  }
  if (digitalRead(3) == LOW) { // Tombol D3 (kanan) ditekan
    cursorX = cursorX + 5;
    display.clearDisplay();
    display.setCursor(cursorX, cursorY);
    display.println("character");
    display.display();
    delay(100);
  }
  if (digitalRead(4) == LOW && cursorY >= 0) { // Tombol D4 (atas) ditekan
    cursorY = cursorY - 5;
    display.clearDisplay();
    display.setCursor(cursorX, cursorY);
    display.println("character");
    display.display();
    delay(100);
  }
  if (digitalRead(5) == LOW && cursorY < 120) { // Tombol D5 (bawah) ditekan
    cursorY = cursorY + 5;
    display.clearDisplay();
    display.setCursor(cursorX, cursorY);
    display.println("character");
    display.display();
    delay(100);
  }
}