Bridget Riley painting approximator: http://www.op-art.co.uk/bridget-riley/ particularly http://www.op-art.co.uk/wp-content/uploads/2011/11/ra-2.jpg just click the green flag and sit back!
Inspired by https://scratch.mit.edu/projects/88226174/?utm_source=hootsuite by @eduard https://scratch.mit.edu/users/eduardm/
