sasquatch

Hello, I'm new to using Djvulibre command line on macos. I am trying to batch convert all files in a specific folder and all its subfolders to PDF and to change the output location. This is the code that I'm using for i in .djvu; do ddjvu -format=pdf -scale=100 "$i" "${i/%.djvu/}.pdf";done but unfortunately the convertion does not go any furt than the current directory im in using Terminal. Can somebody help me with my script to include all its subfolders. Thanks for any help