ls clone in go. It's slightly faster than ls in directories with lots of files

fls.go

package main

import (
	"fmt"
	"github.com/fatih/color"
	"io/ioutil"
)

var (
	fileColor   = color.New(color.FgCyan)
	folderColor = color.New(color.FgBlue, color.Bold)
	hiddenColor = color.New(color.FgRed)
)

func main() {
	files, err := ioutil.ReadDir(".")
	if err != nil {
		panic(err)
	}
	for _, file := range files {
		if file.Name()[0] == '.' {
			hiddenColor.Printf("%dB | %s\n", file.Size(), file.Name())
			continue
		}
		if file.IsDir() {
			folderColor.Printf("%dB | %s\n", file.Size(), file.Name())
			continue
		} else {
			fileColor.Printf("%dB | %s\n", file.Size(), file.Name())
		}
	}
	fmt.Printf("\n")
}