package main

import (
    "fmt"
    "time"
)

func GoroutineTwo() {
    var channelOne chan string = make(chan string)
    var channelTwo chan string = make(chan string)

    go func() {
        for {
            channelOne <- "From channel one."
            time.Sleep(time.Second * 2)
        }
    }()

    go func() {
        for {
            channelTwo <- "From channel two."
            time.Sleep(time.Second * 3)
        }
    }()

    go func() {
        for {
            select {
            case messageOne := <-channelOne:
                fmt.Println(messageOne)
            case messageTwo := <-channelTwo:
                fmt.Println(messageTwo)
            case timeout := <-time.After(time.Second):
                fmt.Println("[", timeout, "] No messages ready.")
            }
        }
    }()

    // Wait for input so the program doesn't close
    // abruptly after it finished running the program.
    var input string
    fmt.Scanln(&input)
}