Script para descargar el "Full Circle Magazine"

#!/bin/bash
echo -n "What is the issue number of the first Full Circle Magazine to
download? "
read firstissue

echo ""
echo -n "What is the issue number of the last Full Circle Magazine to
download? ( > or = the previous number) "
read lastissue

cd ~/Desktop  # ~ brings you to the home directory of the user and from
there I wanted to use my folder 'Desktop'

for a in `seq $firstissue $lastissue`
    do
        wget -U Mozilla "http://dl.fullcirclemagazine.org/issue"$a"_en.pdf"
    done

echo ""
echo "Complete!"