Built-in Mathematica Symbol

Animator

Animator[u]
represents an object which displays with the value of u being continually increased from 0 to 1 with time.

Animator[u, {u_min, u_max}]
makes u vary from u_min to u_max.

Animator[u, {u_min, u_max, du}]
makes u vary in steps du.

Animator[u, {u_min, u_max}, ups]
makes the value of u increase at a rate of ups units per second.

Animator[u, {u_min, Infinity}] will run forever, with u increasing by 1 every second.

Animator[u, {-Infinity, Infinity}] also allows u to decrease forever if the animation is run in reverse.

AnimationDirection	Forward	the direction of the animation
AnimationRunning	True	whether the animation is running
AnimationRate	Automatic	the rate at which to take variables to vary
AnimationRepetitions	Infinity	how many times to run before stopping
Appearance	Automatic	the overall appearance of the animator
AppearanceElements	Automatic	elements to include in the displayed animator
Exclusions	{}	specific u values to exclude
DefaultDuration	5.	the default duration in seconds
DisplayAllSteps	False	whether to force all discrete steps to be displayed
Enabled	Automatic	whether the animator is enabled, or grayed out
ImageMargins	0	margins around the image of the displayed animator
ImageSize	Automatic	the overall image size of the displayed animator

The following elements are included in a default animator: "ProgressSlider", "PlayPauseButton", "FasterSlowerButtons", "DirectionButton". These elements can be specified in any order in a list given as the setting for AppearanceElements.