// const int BUTTON_PIN = 7;
// const int LED_PIN    = 5;
// int ledState = LOW;
// int lastButtonState;
// int currentButtonState;




// void setup() {
//  Serial.begin(9600);                // initialize serial
//   pinMode(BUTTON_PIN, INPUT_PULLUP); // set arduino pin to input pull-up mode
//   pinMode(LED_PIN, OUTPUT);          // set arduino pin to output mode

//   currentButtonState = digitalRead(BUTTON_PIN);
//  // put your setup code here, to run once:

// }

// void loop() {
// lastButtonState    = currentButtonState;      // save the last state
//   currentButtonState = digitalRead(BUTTON_PIN); // read new state

//   if(lastButtonState == HIGH && currentButtonState == LOW) {
   

//     // toggle state of LED
//     ledState = !ledState;

//     // control LED arccoding to the toggled state
//     digitalWrite(LED_PIN, ledState); 
//   }  // put your main code here, to run repeatedly:

// }

const int ledPin =6;
const int BUTTON_PIN=4;
int ledState = LOW;             // ledState used to set the LED
int lastButtonState;
int currentButtonState;

unsigned long previousMillis = 0;
const long interval = 1000;  

void setup() {
  Serial.begin(9600); 
  pinMode(BUTTON_PIN, INPUT_PULLUP);
  pinMode(ledPin, OUTPUT);

   currentButtonState = digitalRead(BUTTON_PIN);
}

void loop() {

unsigned long currentMillis = millis();
 if (currentMillis - previousMillis >= interval) {
    previousMillis = currentMillis;
    if (ledState == LOW) {
      ledState = HIGH;
    } else {
      ledState = LOW;
    }
    digitalWrite(ledPin, ledState);
 }
 }