Blocking example using golang channels

blocking.go

package main

import (
	"fmt"
	"time"
)

func main() {
	c := make(chan bool)
	start := time.Now()
	go func() {
		time.Sleep(2 * time.Second)
		close(c)
	}()
	<-c
	fmt.Printf("%.2f seconds passed", time.Now().Sub(start).Seconds())
}