package main

import (
    "fmt"
    "github.com/mattn/go-colorable"
    "sync"
)

func main() {
    stdout := colorable.NewColorableStdout()
    wg := &sync.WaitGroup{}
    for i := 0; i < 3; i++ {
       wg.Add(1)
       go func() {
           _, _ = fmt.Fprintln(stdout, "\u001b[32mHello\u001b[0m", "World")
           wg.Done()
       }()
    }
    wg.Wait()
}