Creation of Motion/Shape tween using timeline is the basics of Flash.

A motion tween is tweening a Symbol's movement from one position to another. During a tween, the computer generates all of the frames of animation required to move an object from one position to another.

To implement a Motion Tween, two keyframes must exist with a single symbol on a single layer. The object should be in one location in one keyframe, and in another location on the second. Select all of the frames between the two keyframes you wish to tween, right click, and select create motion tween. The frames will be replaced by an arrow. To test, move the playhead to the first keyframe on the left and hit enter. The object should move to the new position.

Motion Tweens can only be done on symbols, like movieclips or buttons. Motion Tweens can scale, translate, and rotate symbols. In order to change the shape of an object, a Shape Tween is needed.