Questions and postings pertaining to the usage of ImageMagick regardless of the interface. This includes the command-line utilities, as well as the C and C++ APIs. Usage questions are like "How do I use ImageMagick to create drop shadows?".
Yes. Perhaps you want to pick one out of a number of fixed images. Or one of a number of templates, each of which might have a number of random parameters. Or something else.
If on Linux, Mac OSX or Windows w/Cygwin, you may be interested in my script randomblob at the link below. Otherwise, you would either have to have a large selection of pre-prepared images to choose randomly or script some kind of random line drawing with the -draw command.