#define LED_PIN  23 
#define LED_PIN 22
#define LED_PIN 21
#define BUTTON_PIN 19
#define BUTTON_PIN 16
#define BUTTON_PIN 17
bool button2Pressed = LOW; // Flag to track the state of the second button
bool button3Pressed = LOW; // Flag to track the state of the third button
bool ledState1;
bool ledState2;
bool ledState3;

int input_ledState3=HIGH;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  pinMode(21, OUTPUT);
  pinMode(22, OUTPUT);
  pinMode(23, OUTPUT);
  pinMode(19, INPUT_PULLUP);
  pinMode(16, INPUT_PULLUP);
  pinMode(17, INPUT_PULLUP);
}

void loop() {
  // put your main code here, to run repeatedly:
  
 if(digitalRead(19)==0){
  digitalWrite(23, HIGH);

 }else {
  digitalWrite(23, LOW);
 }
 // 2 
 if(digitalRead(16)==0){
  if(!button2Pressed){
    button2Pressed= HIGH;
    ledState2= !ledState2;
    digitalWrite(22, ledState2);
    delay(400);
  }

 }else {
  button2Pressed=LOW;
 }

 if (digitalRead(17)==0){

  digitalWrite(21, LOW);
  delay(400);

 }else {digitalWrite(21, HIGH);
 
 }

 
  
 
}