Rajesh Mohanty Copy - Wokwi ESP32, STM32, Arduino Simulator

void setup() {
for(int i=1;i<=3;i++)
{ 
  pinMode(i,OUTPUT);
}
}

void loop() {
  for(int i=1;i<=3;i++)
  {
digitalWrite(13,HIGH);
delay(1000);
digitalWrite(13,LOW);
delay(1000);
  }
}