const int LED1_PIN = 5;
const int LED2_PIN = 18;
const int LED3_PIN = 19;
const int LED4_PIN = 21;

const int BUTTON1_PIN = 4; 
const int BUTTON2_PIN = 13; 
const int BUTTON3_PIN = 14; 
const int BUTTON4_PIN = 15;
bool led1State = false;
bool led2State = false;
bool led3State = false;
bool led4State = false;
void setup() {

  
  Serial.begin(115200);
  Serial.println("Jobert A. Rodriguez Jr.");
  pinMode(LED1_PIN,OUTPUT);
  pinMode(LED2_PIN,OUTPUT);
  pinMode(LED3_PIN,OUTPUT);
  pinMode(LED4_PIN,OUTPUT);

  pinMode(BUTTON1_PIN, INPUT_PULLUP);
  pinMode(BUTTON2_PIN, INPUT_PULLUP);
  pinMode(BUTTON3_PIN, INPUT_PULLUP);
  pinMode(BUTTON4_PIN, INPUT_PULLUP);
}

void loop() {
  bool button1State = digitalRead(BUTTON1_PIN);
  bool button2State = digitalRead(BUTTON2_PIN);
  bool button3State = digitalRead(BUTTON3_PIN);
  bool button4State = digitalRead(BUTTON4_PIN);

  if (!button1State) {
    led1State = !led1State; 
    digitalWrite(LED1_PIN, led1State); 
    delay(100); 
  }
  if (!button2State) {
    led2State = !led2State;
    digitalWrite(LED2_PIN, led2State);
    delay(100);
  }
  if (!button3State) {
    led3State = !led3State;
    digitalWrite(LED3_PIN, led3State);
    delay(100);
  }
  if (!button4State) {
    led4State = !led4State;
    digitalWrite(LED4_PIN, led4State);
    delay(100);
  }


}