Nodemcu and Bluetooth module

The requirements are nodemcu, Bluetooth module. my relay is connected in my nodemcu and I'm currently controlling it in my blynk app, I just want to connect the Bluetooth module in my nodemcu to control relay using Bluetooth terminal app my problem is where should I put the code for Bluetooth.
Here's my code in blynk

#define BLYNK_PRINT Serial
#include
#include

char auth[] = "xxxxxxx";
char ssid[] = "xxxxxxx";
char pass[] = "xxxxxxx";

void setup()
{
Serial.begin(9600);
Blynk.begin(auth, ssid, pwd);
}

void loop()
{
Blynk.run();

}