At the end of animation, how do I cause the value of a property to revert back to it’s original value?

By default, the value of the property on which the animation is applied is overwritten to the ’To’ value of the animation at the end of the animation. But, instead you can reset the property’s value to it’s original value by setting the ‘FillBehavior’ property of the animation to ‘Stop’ (by default it’s set to the HoldEnd enum).