#define BLYNK_PRINT Serial
#define BLYNK_TEMPLATE_ID "TMPL6I1rRWc0L"
#define BLYNK_TEMPLATE_NAME "BLINK LED"
#define BLYNK_AUTH_TOKEN "wpqKba3fD557Z8AvKl11Na4F0oL9xV40"
#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>

char ssid[] = "Wokwi-GUEST";
char pass[] = "";

uint8_t status = 0;
BLYNK_WRITE(V0)
{
  int pb = param.asInt();
  if (pb == 1) digitalWrite(4, HIGH); // No period before digitalWrite
  if (pb == 0) digitalWrite(4, LOW);  // No period before digitalWrite
}

void setup()
{
  pinMode(4, OUTPUT);
  Serial.begin(9600);
  Blynk.begin(BLYNK_AUTH_TOKEN, ssid, pass);
}

void loop()
{
  Blynk.run();
}