Arduino nano + usb connection + soil moisture sensor in Blynk

Hello there! I was 6 months ago working with a soil moisture sensor project of mine and I got it working.
Sadly somehow I lost the files which contained all my custom made projects and forgot how i made it working.

Today somehow I managed it working with this code by using this code by going in Arduino IDE
“Examples->Blynk->Boards USB serial->Arduino serial USB” Pasteing the code under this.

/*************************************************************
Download latest Blynk library here:
https://github.com/blynkkk/blynk-library/releases/latest

Blynk is a platform with iOS and Android apps to control
Arduino, Raspberry Pi and the likes over the Internet.
You can easily build graphic interfaces for all your
projects by simply dragging and dropping widgets.

Downloads, docs, tutorials: http://www.blynk.cc
Sketch generator:           http://examples.blynk.cc
Blynk community:            http://community.blynk.cc
Follow us:                  http://www.fb.com/blynkapp
                            http://twitter.com/blynk_app

Blynk library is licensed under MIT license
This example code is in public domain.


=>
=> USB HOWTO: http://tiny.cc/BlynkUSB
=>

Feel free to apply it to any other example. It’s simple!
*************************************************************/

/* Comment this out to disable prints and save space */
#define BLYNK_PRINT DebugSerial

// You could use a spare Hardware Serial on boards that have it (like Mega)
#include <SoftwareSerial.h>
SoftwareSerial DebugSerial(2, 3); // RX, TX

#include <BlynkSimpleStream.h>

// You should get Auth Token in the Blynk App.
// Go to the Project Settings (nut icon).
char auth[] = “your auth token here”;

void setup()
{
// Debug console
DebugSerial.begin(9600);

// Blynk will work through Serial
// Do not read or write this serial manually in your sketch
Serial.begin(9600);
Blynk.begin(Serial, auth);
}

void loop()
{
Blynk.run();


But my main problem is that I don’t get any option to write down the pin which i need to get data from.
Tried to figure out and search that can I combine multiple sketches before verifying/uploading the sketch into arduino?? Because later I would want to use usb water pump which is communicating with soil moisture.

Or where i can get the sketch which allows me to get data stored in cloud in certain pins and show it in the app in certain values (atm getting reversed soil moisture value where “dry” means value 1023 and wet is 0. and data is stored in Blynk app as long as I’m using the app)

ALso sorry about my poor english, It isn’t my native language and I don’t quite have idea what am I doing anyway :´D