It's http://whatcolourisit.scn9a.org/ but as a Win screensaver.
Original idea and website by J.E.Murphy - http://jemurphy.org/
Also because I saw Jonic(https://github.com/Jonic/WhatColourIsIt-ScreenSaver) made a Mac version.
//How to use
//用法
Download ：WhatColourIsIt.scr/WhatColourIsIt-Release.scr
右键--->安装
(right click---> install)