void setup() {
  Serial.begin(115200);
  pinMode(D2, OUTPUT);
  pinMode(D3, OUTPUT);
  pinMode(D4, OUTPUT);
  
  pinMode(D7, INPUT_PULLUP);

  Serial.println("");
  Serial.println("Hello, XIAO ESP32-C3!");
  Serial.println("Welcome to Wokwi :-)");
}

void loop() {
   if(digitalRead(D7) == LOW){
    digitalWrite(D2, 1);
    digitalWrite(D3, 1);
    digitalWrite(D4, 1);
   } else{
    digitalWrite(D2, 0); 
    digitalWrite(D3, 0); 
    digitalWrite(D4, 0); 
   }
}