visual test - fixed

A question...tricks are needed or is just pure logic?

@delator77 - One trick is needed - if you look at the 1st version within the comments, the author advises that the original intended way was too hard so a trick was added.

This was surprisingly easy. I must have missed the original version, so I cannot compare the two versions.

Walkaround with obscurity as the main feature. Fun distraction. Thanks for sharing.