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

#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
#define OLED_RESET -1
#define SCREEN_ADDRESS 0x3C

//Declare objects
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);


void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  //SSD1306_SWITCHCAPVCC = generate display voltage from 3.3v internally
  if(! display.begin(SSD1306_SWITCHCAPVCC, SCREEN_ADDRESS)){
    Serial.println(F("SSD1306 allocation failed"));
    for(;;);
  }

  //show the display buffer on the screen. you MUST call display()after
  //drawing commands to make them visible on screen!
  display.display();
  delay(1000);

  //clear the buffer
  display.clearDisplay();

  print_line();
  
}

void loop() {
  // put your main code here, to run repeatedly:
  delay(1000); // this speeds up the simulation
}

void print_line(void){
 //clear the buffer
  display.clearDisplay();
  display.setTextSize(2);
  display.setTextColor(SSD1306_WHITE);

  display.setCursor(0,0);
  display.println(F("Welcome 1"));
  display.display();
  delay(1000);

  display.clearDisplay();

  display.setCursor(20,20);
  display.println(F("Welcome 2"));
  display.display();
  delay(1000);

}