mv "$tmp/00000001.jpg" "${tmp}/_${cnt}.jpg"
done
montage "${tmp}"/_[1234].jpg -tile 2x2+0+0 -geometry 100x75+3+3 -background '#000000' "${thumb}"
mv "$tmp/00000001.jpg" "${tmp}/_${cnt}.jpg"
done
montage "${tmp}"/_[1234].jpg -tile 2x2+0+0 -geometry 100x75+3+3 -background '#000000' "${thumb}"