int status = 0;  // Variable to track LED states

void setup() {
    // Set LED pins as OUTPUT
    pinMode(13, OUTPUT);
    pinMode(12, OUTPUT);
    pinMode(11, OUTPUT);

    // Set button pin as INPUT
    pinMode(A0 , INPUT);

    // Initialize all LEDs to OFF
    digitalWrite(13, LOW);
    digitalWrite(12, LOW);
    digitalWrite(11, LOW);

     Serial.begin(9600);
   
}

void loop() {
    
    if (analogRead(A0) > 512) { 
        status++;           
        delay(100);         
    }


    if (status == 1) {
        digitalWrite(13, HIGH);   
        digitalWrite(12, LOW);     
        digitalWrite(11, LOW);
        
         Serial.println("Led1");
    } 
    else if (status == 2) {
        digitalWrite(13, LOW);    
        digitalWrite(12, HIGH);    
        digitalWrite(11, LOW);
         
         Serial.println("Led2");
    } 
    else if (status == 3) {
        digitalWrite(13, LOW);  
        digitalWrite(12, LOW);    
        digitalWrite(11, HIGH);  
        
        Serial.println("Led3 on"); 
    } 
    else if (status >= 4) {
        
        status = 0;
        digitalWrite(13, LOW);
        digitalWrite(12, LOW);
        digitalWrite(11, LOW);
    }
}