Usually they get your attention for a moment, but they can also become irritating, especially when they have no meaning or reason. Graphics Pictures and graphics are usually used to better illustrate what you are writing about. The reason to use animation instead of a static graphic is to demonstrate the actual movement that is described. The movement should have a purpose or reason. It should not be simply to show animation for its own sake.
Motion can be simple or complex.
Simple motion of an object from one place to another and changing size, shape, or color of an object is done by the animation technique of tweening. Complex motions involving a number of objects moving independently can also be done using tweening, with the addition of placing each movement on a separate layer. Complex motions involving the movement of various parts of an object such as the flight of a bird are best done using individual frames for each part of the movement. Requirements on Flash Flash animations required a browser plug-in, but they also could be made as GIF animations. In conclusion Macromedia Flash has a good set of vector-based drawing tools, as well as animation tools.