/******************************************************************************
This Arduino sketch sets up and uses an OLED display (128x64 pixels) to show text and a counter. 
The code uses several libraries such as SPI, Wire, Adafruit_GFX, and Adafruit_SSD1306. 
The display is initialized in the setup() function, and a "Hello, world!" message and a 
"test" message are shown on the screen.

In the loop() function, the display is cleared, and the value of the variable x is
 printed at coordinates (0, 20) on the screen. The value of x is incremented every
  second, and the display is updated accordingly.

The code uses the SSD1306 library and the Adafruit_GFX library to handle the OLED display.
 It initializes the display, sets rotation, displays text messages, and updates the display 
 with the value of the counter.

Note: The provided code is only a part of a larger program
, and its functionality may depend on other parts of the code not shown here.


**********************************************************************/
#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

#define OLED_RESET     4 // Reset pin # (or -1 if sharing Arduino reset pin)
#define SCREEN_ADDRESS 0x3C ///< See datasheet for Address; 0x3D for 128x64, 0x3C for 128x32
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);
  int x = 0;

void setup() {
  Serial.begin(9600);
  // SSD1306_SWITCHCAPVCC = generate display voltage from 3.3V internally
  if(!display.begin(SSD1306_SWITCHCAPVCC, SCREEN_ADDRESS)) {
    Serial.println(F("SSD1306 allocation failed"));
    for(;;); // Don't proceed, loop forever
  }
  display.setRotation(4); //sets rotation 1 through 4  
  display.display();
  delay(1000); // Pause for 2 seconds
  // Clear the buffer
  display.clearDisplay();
  // Draw text
  display.setTextSize(2);             // Normal 1:1 pixel scale
  display.setTextColor(SSD1306_WHITE);        // Draw white text
  display.setCursor(10,0);             // Start at top-left corner
  display.print("BY ARVIND");
  delay(300);
  display.setCursor(0,30);  
  display.print("seconds");
 delay(300);
  display.setCursor(0,50);  
  display.print("counter");

  // Show the display buffer on the screen. You MUST call display() after
  // drawing commands to make them visible on screen!
  display.display();
  delay(2000);
  display.setTextSize(6); 
}

void loop() {
  display.clearDisplay();
  display.setCursor(0,20);
  display.print(x);
  display.display();
  delay(1000);
  x++;
}