This class extends CompositeAnimation for composite animations (an animation built of 2 or more animations) that run one after another in sequence.

	initialization
	children:undoable:inWonderland:

	management
	prologue: update:

	reversing
	reverseDirection

	copying	top
	copy Creates a copy of the animation
	makeUndoVersion Creates the undo version of an animation
	reversed Creates a reversed version of an animation

	initialization	top
	children:undoable:inWonderland: This method initializes the Animation with all the information that it needs run.

	management	top
	prologue: Overrides the Animation prologue: message to set the index of the current animation to 1
	update: This method updates the sequential animation based on the current time.

	reversing	top
	reverseDirection Changes the direction an animation runs in (forward or in reverse)