CSS experiment: click challenge

Author: Andy Li
Version: 2009-11-22

Click on the white area as many time as possible in 30 seconds. The timer will start once you clicked (counter shown as 1).

This is a CSS-only experiment. It uses CSS counter, CSS keyframe animation and CSS pseudo class ":checked". It works on latest Chrome and Safari.

PHP is used in the back-end to generate the HTML. There is no tricky things there, just tired of typing those repeating things.