text: package main
  
  import (
  	"fmt"
  	"sync"
  
  	"github.com/urfave/negroni"
  	"gopkg.in/tylerb/graceful.v1"
  )
  
  func main() {
  
  	var wg sync.WaitGroup
  
  	wg.Add(3)
  	go func() {
  		n := negroni.New()
  		fmt.Println("Launching server on :3000")
  		graceful.Run(":3000", 0, n)
  		fmt.Println("Terminated server on :3000")
  		wg.Done()
  	}()
  	go func() {
  		n := negroni.New()
  		fmt.Println("Launching server on :3001")
  		graceful.Run(":3001", 0, n)
  		fmt.Println("Terminated server on :3001")
  		wg.Done()
  	}()
  	go func() {
  		n := negroni.New()
  		fmt.Println("Launching server on :3002")
  		graceful.Run(":3002", 0, n)
  		fmt.Println("Terminated server on :3002")
  		wg.Done()
  	}()
  	fmt.Println("Press ctrl+c. All servers should terminate.")
  	wg.Wait()
  
  }
  