Infinite loop to get data from a source

loop.go

package main

import (
	"fmt"
	"math/rand"
	"time"
)

func main() {
	dataChan := make(chan string)
	go func() {
		for {
			dataChan <- fmt.Sprintf("data %f", rand.Int())
			time.Sleep(time.Second)
		}
	}()
	afterCh := time.After(5 * time.Second)
	ll := []string{}
	for {
		select {
		case l := <-dataChan:
			fmt.Println("Got:", l)
			ll = append(ll, l)
		case <-afterCh:
			fmt.Println("Do some processing with %v", ll)
			afterCh = time.After(5 * time.Second)
			ll = []string{}
		}
	}
}