wait.sh - Simple script which pretends to carry out a process and puts fake progress info to stdout.

#!/bin/sh

[ -n "${1##*[!0-9]*}" ] && MAX=$1 || MAX=100
while [ $((VAL=$VAL+1)) -le $MAX ]; do
    printf "\r%$((${#MAX}+1))s" $VAL"%"
    sleep 0.02s
done
echo