#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     -1 // Reset pin # (or -1 if sharing Arduino reset pin)
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);






void setup() {
  // put your setup code here, to run once:


  // 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
  }

  // Show initial display buffer contents on the screen --
  // the library initializes this with an Adafruit splash screen.
  //display.display();
  delay(200); // Pause for 2 seconds

  // Clear the buffer
  display.clearDisplay();


}

void loop() {
  // put your main code here, to run repeatedly:

// Invert and restore display, pausing in-between
 
 
  //display.invertDisplay(true);
  //delay(1000);
  

display.clearDisplay();

//display.clearLine(7);
display.setTextColor(SSD1306_WHITE);
display.setCursor(0,0);
display.setTextSize(1);      // Normal 1:1 pixel scale
display.print("M: ");display.print(millis());
display.setCursor(0,10);
display.print("M/2: ");display.print(millis()/200);
display.setCursor(0,20);
display.print("%: ");display.print(millis()/200 % 60);


display.display();
//delay(2000);
//display.invertDisplay(false);
//delay(1000);
 
}