presentation_to_pdf.sh

echo "You have 10 seconds, then I'll start and take $[$1 + 1] screenshots and press space $1 times"
sleep 10
/usr/bin/import -window root "screen_0.jpg"
for i in `seq -w 1 $1`; do
    xdotool key space
    sleep 3
    /usr/bin/import -window root "screen_${i}.jpg"
done
convert "screen_*.jpg" presentation_to_pdf.pdf
rm screen_*.jpg