private void Start()
{
var tweenCore = _builder.TweenCore;
var unknownTween = new UnityTweenUnknown(Fill, Complete)
.SetDuration(2.0f);
tweenCore.Append(unknownTween);
_builder.PlayForward();
UnityTweenPosition posTween = new UnityTweenPosition(transform, Vector3.one);
posTween.SetTo(Vector3.zero);
}