package main
import (
	"fmt"
	"time"
)
func () {
	tiker := time.NewTicker(1 * time.Second)
	c2 := make(chan struct{})
	go func() {
		time.Sleep(4e9) 
		c2 <- struct{}{}
	}()
	go func() {
		time.Sleep(3e9) // 3s
		tiker.Stop() //
	}()
for_1:
	for {
		select {
		case <-tiker.C:
			fmt.Println(1)
		case <-c2:
			fmt.Println(2)
			break for_1
		}
	}
}