#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    -1 // 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_position=64;
int i;

void setup() {
    Serial.begin(9600);
       // initialize the OLED display 
    display.begin(SSD1306_SWITCHCAPVCC, SCREEN_ADDRESS);
    display.clearDisplay();

    //DRAWING SHAPES///
//ALT SQUARE
display.drawRect(8,10,25,15,WHITE); //
//ALT TEXT
display.setTextSize(1);
display.setTextColor(WHITE);
display.setCursor(8,0);
display.print("ALT");
//UNIT
display.setTextSize(2);
display.setTextColor(WHITE);
display.setCursor(35,8);
display.print("m");

//SECOND SQUARE
display.drawRect(76,10,25,15,WHITE);
//HDG TEXT
display.setTextSize(1);
display.setTextColor(WHITE);
display.setCursor(76,0);
display.print("HDG");
//UNIT
display.setTextSize(1.9);
display.setTextColor(WHITE);
display.setCursor(103,14);
display.print("deg");
    
//LINES
//display.drawLine(64,36,64,39,WHITE); display.drawLine(96,36,96,39,WHITE); display.drawLine(124,36,124,39,WHITE);

//LINE NUMBERS//

display.setTextSize(1);
display.setTextColor(WHITE);
display.setCursor(6,31);
display.print("-""10"); 

display.setTextSize(1);
display.setTextColor(WHITE);
display.setCursor(35,31); 
display.print("-" "5");

display.setTextSize(1);
display.setTextColor(WHITE);  
display.setCursor(62,31); 
display.print('0');   

display.setTextSize(1);
display.setTextColor(WHITE);
display.setCursor(84,31); 
//showing +5
display.print("+""5");
//display.drawLine(82,33,85,33,WHITE);
//display.drawLine(84,32,84,35,WHITE);

display.setTextSize(1);
display.setTextColor(WHITE);
display.setCursor(110,31);
display.print("+""10");

display.drawRect(10,40,118,8,WHITE); //TOP BAR
display.fillCircle(4,44,2,WHITE); //TOP BAR CIRCLE
display.drawRect(10,55,118,8,WHITE); //BOTTOM BAR
display.fillCircle(4,58,2,WHITE); 
}

void loop(){
int x_position=60;
  
int  num[]={1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,23,23,23,23,24,354,23,23234,24,23,421,23,23,24,244,34};
for ( byte i=0;i < (sizeof(num) / sizeof(num[0])); i++) { 

//
  if (i<=12){
    x_position=x_position+4;

////////////////////////////////////////////////////////////////////////////////////////////////////

//ALT VALUE
    display.setTextSize(1);
    display.setTextColor(WHITE);
    display.setCursor(12,14);
    display.print(x_position);
    

//HDG VALUE
    display.setTextSize(1);
    display.setTextColor(WHITE);
    display.setCursor(80,14);
    display.print(x_position);


    display.drawRect(x_position,41,10,6,WHITE); //TOP SCROLER
    display.drawRect(x_position,56,10,6,WHITE); // BOTTOM SCROLER
    display.display();
    delay(200); //we need a display.display and a delay before we blank anything out.

    display.fillRect(12,14,18,10,BLACK); //ALT blank
    display.fillRect(80,14,18,10,BLACK); //HDG blank
    display.drawRect(x_position,41,10,6,BLACK); //TOP scroller blank
    display.drawRect(x_position,56,10,6,BLACK); //bOTTOM scroller blank
    }
  
  else if (i>=5){
    x_position=x_position-4;
     
//DISPLAY ALT VALUE
    display.setTextSize(1);
    display.setTextColor(WHITE);
    display.setCursor(12,14);
    display.print(x_position);

// DISPLAY HDG VALUE
    display.setTextSize(1);
    display.setTextColor(WHITE);
    display.setCursor(80,14);
    display.print(x_position);

//DISPLAY SCROLLER MOVING IN RELATION TO THE ALT/DDG CHANGE
    display.drawRect(x_position,41,10,6,WHITE); //TOP SCROLER
    display.drawRect(x_position,56,10,6,WHITE); // BOTTOM SCROLER
    display.display();
    delay(200); //we need a display.display and a delay before we blank anything out.

    display.fillRect(12,14,18,10,BLACK); //ALT blink
    display.fillRect(80,14,18,10,BLACK); //HDG blink
    display.drawRect(x_position,41,10,6,BLACK); //TOP scroller blink
    display.drawRect(x_position,56,10,6,BLACK); //bOTTOM scroller blink
   
    }
  
  }
}