#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <Servo.h>

Adafruit_SSD1306 display(128, 64, &Wire, -1);
Servo myServo;

const int angleOptions[] = {0, 45, 90, 135, 180};
const int numAngles = sizeof(angleOptions) / sizeof(angleOptions[0]); 
int currentIndex = 0;
const int buttonPin = 2;
const int piezoPin = 8;  
int angle = 0;          

void setup() {
    Serial.begin(9600);
    myServo.attach(9); 
    pinMode(buttonPin, INPUT_PULLUP); 
    pinMode(piezoPin, OUTPUT); 

    
    display.begin(SSD1306_SWITCHCAPVCC, 0x3C); 
    display.clearDisplay();
    display.setTextSize(1);
    display.setTextColor(WHITE);
    display.setCursor(0, 0);
    display.println("Ygol:");
    display.display();
}

void loop() {
    
    if (digitalRead(buttonPin) == LOW) {
        currentIndex++; 
        if (currentIndex >= numAngles) {
            currentIndex = 0; 
        }
        
        angle = angleOptions[currentIndex]; 
        myServo.write(angle); 

        
        tone(piezoPin, 1000, 200); 

     
        display.clearDisplay();
        display.setCursor(0, 0);
        display.print("Ygol:");
        
        
        for (int i = 0; i < numAngles; i++) {
            display.setCursor(0, (i + 1) * 10); 
            display.print(angleOptions[i]); 
            if (i == currentIndex) {
                display.print(" <"); 
            }
        }

        display.display();

        delay(500); 
    }
}