question no 1 part b - Wokwi ESP32, STM32, Arduino Simulator

const int ledPin = 4; 
bool isBlinking = false;

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

void loop() {

    digitalWrite(ledPin, HIGH);
    delay(500); // LED On 
    digitalWrite(ledPin, LOW);
    delay(900); // LED Off
}