#define BLYNK_TEMPLATE_ID "TMPLB6F70Ek2"
#define BLYNK_DEVICE_NAME "ESP32NEOPIXEL"
#define BLYNK_AUTH_TOKEN "Yr4IEVkjHlpTGEZLqE3ZmxEJtZgPAkjA"

#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>
#include <Adafruit_NeoPixel.h>

char auth[] = "Yr4IEVkjHlpTGEZLqE3ZmxEJtZgPAkjA";
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

#define PIN 2
#define NUMPIXELS 4
int R=0;
int G=0;
int B=0;

Adafruit_NeoPixel pixels = Adafruit_NeoPixel(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800); 

void setup() 
{
  Serial.begin(115200);
  Blynk.begin(auth, ssid, pass);
  pixels.begin();
}

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

BLYNK_WRITE(V0)
{
  R = param.asInt();
  NeoShow();
}

BLYNK_WRITE(V1)
{
  G = param.asInt();
  NeoShow();
}

BLYNK_WRITE(V2)
{
  B = param.asInt();
  NeoShow();
}

void NeoShow()
{
  for(int i=0;i<=NUMPIXELS;i++)
  {
    pixels.setPixelColor(i, pixels.Color(0,0,0));
    pixels.show();
    delay(10);
  }

  for(int i=0;i<=NUMPIXELS;i++)
  {
    pixels.setPixelColor(i, pixels.Color(R,G,B));
    pixels.show();
    delay(10);
  }
}