Progress...

progress_bar.sh

#!/bin/sh

ECHO="echo -e"
case `$ECHO` in
	-e)
		ECHO=echo;;
esac

print_bar()
{
	percent=$1

	column=`expr 71 \* "$percent" / 100`
	nspace=`expr 71 - "$column"`

	bar='\r['
	set dummy
	while [ $# -le "$column" ]
	do
		bar=$bar'='
		set - "$@" dummy
	done
	bar=$bar'>'

	set dummy
	while [ $# -le "$nspace" ]
	do
		bar=$bar' '
		set - "$@" dummy
	done
	bar=$bar'] '$percent'%\c'

	$ECHO "$bar"
}

i=0
while [ "$i" -le 100 ]
do
	print_bar "$i"
	i=`expr "$i" + 1`
	sleep 1
done
echo

progress_easy.sh

#!/bin/bash

for ((current_count=0; ; current_count++)); do
	let type=current_count%4
	case "$type" in
		0) echo -ne "|\033[1D";;
		1) echo -ne "\\\\\033[1D";;
		2) echo -ne "-\033[1D";;
		3) echo -ne "/\033[1D";;
	esac
	sleep 0.01s
done &

if sleep 3; then
	kill -9 $!
fi

progress_func.sh

#!/bin/bash

function progress-rotate-animation(){
	local start_count=$1
	local end_count=$2

	if [ $# -eq 3 ]; then
		local interval_second=$3
	fi

	for ((current_count=start_count;current_count<end_count;current_count++));
	do
		let type=current_count%4
		case $type in
			0) echo -ne "|\033[1D";;
			1) echo -ne "/\033[1D";;
			2) echo -ne "-\033[1D";;
			3) echo -ne "\\\\\033[1D";;
		esac

		if [ $interval_second ]; then
			sleep $interval_second
		fi
	done
}

progress-rotate-animation 0 100 0.01s