Tweener (caurina.transitions.Tweener) is a Class used to create tweenings and other transitions via ActionScript code for projects built on the Flash platform.

Aimed both for designers and advanced developers, the Tweener syntax is created with simplicity of use in mind, while still allowing access to more advanced features. Because of this, it follows a ‘one-line’ design mentality when creating new tweenings, with no instancing required (as it’s a static Class) and a set of optional parameters. Also, there are no initialization methods required by Tweener, other than the mandatory ‘import’ command…

More info at Tweener.