Question variant of my upvote clock (font used is "Century Schoolbook L", converted to a shape for portability, with the dot replaced with a circle for precision). The question marks spin around at twice the speed that they rotate around the circle, and change colour once they complete a circle. This makes a full cycle two minutes, rather than one. [Yes, the thumnail colours are wrong. Sorry about that]
Question Clock free icon was designed by gringer for icons Png and presented to its users.
gringer
9/15/2017