//#include <SPI.h>
//#include <Wire.h>
//#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels

// Declaration for an SSD1306 display connected to I2C (SDA, SCL pins)
#define OLED_RESET     4 // Reset pin # (or -1 if sharing Arduino reset pin)
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);




void printrow(byte, const char []);
void clearrow(byte);

int value=0;



void setup() {
// SSD1306_SWITCHCAPVCC = generate display voltage from 3.3V internally
  if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) { // Address 0x3D for 128x64
    Serial.println(F("SSD1306 allocation failed"));
    for(;;); // Don't proceed, loop forever
  }



  delay(1000);
  
}

void loop()
 {
 value++;
  
  display.setTextSize(2);
  display.setTextColor(WHITE);
  printrow(1,"Row 1 ");
 display.print(value);
printrow(2,"Row 1 ");
 display.print(value);
printrow(3,"Row 1 ");
 display.print(value);
printrow(4,"Row 1 ");
 display.print(value);
display.display();
delay(500);
}


void printrow(byte row, const char text[]) // This prints by row clearing it first
{
    switch (row)
    {
    case 1:
        row = 0;
        break;
    case 2:
        row = 16;
        break;
    case 3:
        row = 32;
        break;
    case 4:
        row = 48;
        break;
    }
    display.fillRect(0, row, 120, 16, BLACK); // erases whole row first 120 is width and 16 is height
    display.setCursor(0, row);
    display.print(text);
}

void clearrow(byte row)
{
    printrow(row, "");
}