/**************************************************************************
 Version SSD1306_Test1e: Uses #defines for text blocks' x, y coords.
 **************************************************************************/
#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
//----x, y coords for text block------
#define REPS_X 20
#define REPS_Y 24
//----Test Sizes-------
#define REPS_TEXT_SIZE 6
// Declaration for an SSD1306 display connected to I2C (SDA, SCL pins)
#define OLED_RESET     -1 // Reset pin # (or -1 if sharing Arduino resetpin)
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

int Reps = 1; // Rep  counter to be displayed on OLED screen.

void setup()
{

     Serial.begin(115200);
     delay(1000);
    // SSD1306_SWITCHCAPVCC = generate display voltage from 3.3V internally
    if (!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
    Serial.println(F("SSD1306 allocation failed"));
    for (;;); // Don't proceed, loop forever
    } //
    // Clear the buffer.
    display.clearDisplay();
    display.setTextSize(2);
    display.setFont(NULL);
    display.setTextColor(WHITE, BLACK);
    display.setCursor(1, 0);
    display.println("REPS:");
    display.println("");
    display.display();  
}

void loop() {
  for (int Reps = 1; Reps <= 110; Reps++) {
    display.setCursor(REPS_X, REPS_Y);
    display.setTextSize(6);

    // Drawing the number in WHITE
    display.setTextColor(WHITE, BLACK);   
    display.println(Reps); // show 'Reps' in white
    display.display();
    delay(250);  // wait for a second

    // "Erasing" the number with BLACK
    // Here, we need to ensure we're overwriting the exact position. Resetting the cursor is crucial.
    display.setCursor(REPS_X, REPS_Y);  // Reset cursor to ensure black color overwrites the exact position
    display.setTextColor(BLACK, BLACK); // "erase" 'Reps' by writing in black
    display.println(Reps); 
    display.display();
    
    // If you don't clear the screen or part of it, old data from the buffer can remain as a ghost on the display. 
    // So, you may need to manage clearing specific parts of the screen or ensure exact overwriting depending on your needs.
  }

  // After reaching 10, the loop restarts, and 'Reps' is reset to 1 by the 'for' loop's control structure.
}