You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: main.go
    path of file: ./repos/training/example43-progress-bar
    
    the code of the file until where you have to start completion: package main

import (
	"crypto/rand"
	"io"
	"io/ioutil"
	"log"

	"github.com/cheggaaa/pb/v3"
)

func main() {

	var limit int64 = 1024 * 1024 * 10000
	// we will copy 10 Gb from
    
func main() {

	var limit int64 = 1024 * 1024 * 10000
	// we will copy 10 Gb from /dev/rand to /dev/null
	reader := io.LimitReader(rand.Reader, limit)
	writer := ioutil.Discard

	// start new bar
	bar := pb.Full.Start64(limit)
	// create proxy reader
	barReader := bar.NewProxyReader(reader)
	// copy from proxy reader
	if _, err := io.Copy(writer, barReader); err != nil {
		log.Fatal(err)
	}
	// finish bar
	bar.Finish()
}