simplerepeater.go

package main

import (
	"fmt"
	"time"
)

func doEvery(d time.Duration, f func(time.Time)) {
	for x := range time.Tick(d) {
		f(x)
	}
}

func main() {
	doEvery(20*time.Millisecond, func(t time.Time) {
		fmt.Println("hello world at: ", t)
	})
}