Sunflower is a Gnome Applet

 
SunflowerApplet changes the shadow on the windows managed by compiz when the decorator plugin is enabled. The shadow on the window moves from left to right from sunrise to sunset, and stays static from sunset to sunrise, as if the shadow is being cast by the "sun" moving right to left over your windows. This is just a toy. It requires compiz to be the window manager and the compiz decorator plugin to be active. It does not appear to work with compiz-quinn or beryl.

After you install it, select the panel you want to add it to, right click and select "Add to Panel" then scroll thru the list and select Sunflower. A panel applet should appear and your window shadow may adjust. Watch it during the day and the shadow should slowly slide from left to right.

To reload the applet, just run

kill sunflower

And it will reload, do this when you update the program.

