#include <Wire.h>
#include <U8g2lib.h> 

//Select the option that matches the dimensions of the OLED
U8G2_SSD1306_128X64_NONAME_F_HW_I2C DISPA(U8G2_R0, /* reset=*/ U8X8_PIN_NONE);

//Pins for SDA and SCL
#define SDA 4  
#define SCL 5
//LED pin
int LED = D9;

void setup() {
  //LED
  pinMode(LED, OUTPUT);
  //SDA and SCL pinout
  pinMode(SDA, OUTPUT);  
  pinMode(SCL, OUTPUT);
  // Set I2C bus speed on board and both displays
  Wire.setClock(100000);
  DISPA.setBusClock(100000);
  //Set I2C Adress (0x78/0x7A, or 0x3C/0x3D) of the OLED
  DISPA.setI2CAddress(0x78);
  //Turn on OLED and get it ready to accept data
  DISPA.begin();
  //Select a font
  DISPA.setFont(u8g2_font_logisoso16_tf );
  //Make sure the display buffer is clear
  DISPA.clearBuffer();
}

void loop() {
    //Display
    DISPA.clearBuffer();
    DISPA.setCursor(30, 20); //(X,Y)
    DISPA.print("Program");
    DISPA.setCursor(60, 43);
    DISPA.print("A");
    DISPA.sendBuffer(); //Command to show things on display
    //LED
    digitalWrite(LED, HIGH);
    delay(1000);
    digitalWrite(LED, LOW);
    delay(1000);
}