This extension can be added to any widget, and it lets you animate them with CSS3 using keyframes.
Animation Type
Choose the animation you want to use from available animation types.
Transform origin
Set the animation transform origin (CSS property).
Iteration
Set the animation iteration whether on loop or for defined number of times.
Duration: set the time in seconds for the animation to take for completing one cycle
Delay: the animation will start after this time
Timing Function: it specifies the speed curve of the animation
Direction: defines whether the animation should be played forwards, backward, or in alternate cycles.
Fill Mode: specifies a style for the element when the animation is not playing (before it starts, after it ends, or both). (more details)
