Shell-彩色进度条~

#!/bin/bash

num=0
str='#'
max=100
pro=('|' '/' '-' '\')
while [ $num -le $max ]
do
    ((color=30+num%8))
    echo -en "\e[1;"$color"m"
    let index=num%4
    printf "[%-100s %d%% %c]\r" "$str" "$num" "${pro[$index]}"
    let num++
    sleep 0.1
    str+='#'
done
printf "\n"
echo -e "\e[1;30;m"