Simple goroutine with bug

goroutine.go

package main

import (
	"log"
	"time"
)

func main() {
	// anonymous function
	go func() {
		time.Sleep(time.Second * 2)
		// you won't see this unless your computer is very slow
		log.Println("*********************Work complete after 2 seconds**************")
	}()
	for i := 0; i < 10000; i++ {
		//doing stuff
		log.Println(i * 4)
	}
}