You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: format.go
    path of file: ./repos/sampler/component/util
    
    the code of the file until where you have to start completion: package util

import (
	"bytes"
	"fmt"
	ui "github.com/gizak/termui/v3"
	"image"
	"math"
	"strconv"
	"strings"
)

var AsciiLogo = []string{
	"                               __         ",
	"   _________  ____ ___  ____  / /__  _____",
	"  / ___/ __ `/ __ `__ \\/ __ \\/ / _ \\/ ___/",
	" (__  ) /_/ / / / / / / /_/ / /  __/ /    
    
func FormatDelta(value float64, scale int) string {

	abs := math.Abs(value)
	val := value
	scl := scale

	postfix := ""

	if abs > 1000 && abs < 1000000 {
		val = float64(value) / 1000
		postfix = "k"
	} else if abs > 1000000 && abs < 1000000000 {
		val = float64(value) / 1000000
		postfix = "M"
	} else if abs > 1000000000 {
		val = float64(value) / 1000000000
		postfix = "B"
	}

	if abs > 1000 {
		scl = 1
	}

	if val == 0 {
		return " 0"
	} else if val > 0 {
		return fmt.Sprintf("+%s%s", FormatValue(val, scl), postfix)
	} else {
		return fmt.Sprintf("%s%s", FormatValue(val, scl), postfix)
	}
}