Pulsing goroutine

gistfile1.txt

import (
	"bufio"
	"fmt"
	"io"
	"os"
	"time"
)

func main() {
	quit := make(chan bool)
	screen := bufio.NewWriter(os.Stdout)

	go pulse(screen, quit)

	time.Sleep(2 * time.Second)
	quit <- true
}

func pulse(w io.Writer, q chan bool) {
	var tk *time.Ticker
	{
		tk = time.NewTicker(2 * time.Second)
	}
	for {
		select {
		case <-tk.C:
			fmt.Println("tick\n")
			w.WriteString(fmt.Sprintf("%s\n", tk.C))
		case <-q:
			tk.Stop()
			return
		}
	}
}