#!/bin/bash

if [ "$1" = "-h" -o "$1" = "--help" ]; then
    echo "usage: aasquare.sh [ width ] [ height ]"
    exit 0
fi

WIDTH=$1
WIDTH=${WIDTH:-5}

LENGTH=$2
LENGTH=${LENGTH:-${WIDTH}}

i=0

echo -n ' '
while [ $i -lt `expr ${WIDTH} - 2` ]; do
    i=`expr $i + 1`
    echo -n "_"
done
echo

i=0

while [ $i -lt `expr ${LENGTH} - 1` ]; do
    i=`expr $i + 1`
    echo -n "|"
    j=0
    while [ $j -lt `expr ${WIDTH} - 2` ]; do
	j=`expr $j + 1`
	echo -n ' '
    done
    echo "|"
done

i=0

echo -n "|"
j=0
while [ $j -lt `expr ${WIDTH} - 2` ]; do
    j=`expr $j + 1`
    echo -n "_"
done
echo "|"

echo