Tried out creating one Op Art, with Flow. I think it need some more work, with different target curve...
(Finally figured out that selecting Base and Target does not work with Object or Style selection, Flow need some
sort of information of the Base and Target, so need to click on them.)


Here is a reference to two school projects. Did not use their programs.

http://www.doc.ic.ac.uk/~pjm/teaching/bridget_riley.html