const int led1 = 3;
 const int led2 = 4;
 const int led3 = A0;
 const int led4 = A5;

 const int button1 = 2;
 const int button2 = 5;
 const int button3 = A1;
 const int button4 = A2;


 void setup() {
  
   pinMode(led1, OUTPUT);
   pinMode(led2, OUTPUT);
   pinMode(led3, OUTPUT);
   pinMode(led4, OUTPUT);

   pinMode(button1, INPUT_PULLUP); 
   pinMode(button2, INPUT_PULLUP); 
   pinMode(button3, INPUT_PULLUP);
   pinMode(button4, INPUT_PULLUP);
 }

 void loop() { 
   if(digitalRead(button1) == LOW){
     digitalWrite(led1,HIGH);
   }else{
     digitalWrite(led1,LOW);
   }

   if(digitalRead(button2) == LOW){
     digitalWrite(led2,HIGH);
   }else{
     digitalWrite(led2,LOW);
   }

   if(digitalRead(button3) == LOW){
     digitalWrite(led3,HIGH);
   }else{
     digitalWrite(led3,LOW);
   }

   if(digitalRead(button4) == LOW){
     digitalWrite(led4,HIGH);
   }else{
     digitalWrite(led4,LOW);
   }

 }

// const int led1 = 3;
// const int led2 = 4;
// const int led3 = A0;
// const int led4 = A5;

// const int button1 = 2; // Connect one end of the push button to pin 2
// const int button2 = 5; // Connect one end of the push button to pin 5
// const int button3 = A1; // Connect one end of the push button to pin A1
// const int button4 = A2; // Connect one end of the push button to pin A2

// bool led1State = false;
// bool led2State = false;
// bool led3State = false;
// bool led4State = false;

// void setup() {
//   pinMode(led1, OUTPUT);
//   pinMode(led2, OUTPUT);
//   pinMode(led3, OUTPUT);
//   pinMode(led4, OUTPUT);
  
//   pinMode(button1, INPUT_PULLUP); // Activate internal pull-up resistor
//   pinMode(button2, INPUT_PULLUP); // Activate internal pull-up resistor
//   pinMode(button3, INPUT_PULLUP); // Activate internal pull-up resistor
//   pinMode(button4, INPUT_PULLUP); // Activate internal pull-up resistor
// }

// void loop() { 
//   // Check if button 1 is pressed
//   if (digitalRead(button1) == LOW) {
//     if (!led1State) {
//       digitalWrite(led1, HIGH); // Turn on LED1
//       led1State = true;
//     } else {
//       digitalWrite(led1, LOW); // Turn off LED1
//       led1State = false;
//     }
//     delay(200); // Debounce delay
//   }

//   // Check if button 2 is pressed
//   if (digitalRead(button2) == LOW) {
//     if (!led2State) {
//       digitalWrite(led2, HIGH); // Turn on LED2
//       led2State = true;
//     } else {
//       digitalWrite(led2, LOW); // Turn off LED2
//       led2State = false;
//     }
//     delay(200); // Debounce delay
//   }

//   // Check if button 3 is pressed
//   if (digitalRead(button3) == LOW) {
//     if (!led3State) {
//       digitalWrite(led3, HIGH); // Turn on LED3
//       led3State = true;
//     } else {
//       digitalWrite(led3, LOW); // Turn off LED3
//       led3State = false;
//     }
//     delay(200); // Debounce delay
//   }

//   // Check if button 4 is pressed
//   if (digitalRead(button4) == LOW) {
//     if (!led4State) {
//       digitalWrite(led4, HIGH); // Turn on LED4
//       led4State = true;
//     } else {
//       digitalWrite(led4, LOW); // Turn off LED4
//       led4State = false;
//     }
//     delay(200); // Debounce delay
//   }
// }