Return item to start point if dropped outside any drop target

Thank you for the response Kelly! It's a little tricky because my drag and drop activity does not have correct or incorrect answers. Any drop target is acceptable for any draggable object, so I don't think I can define correct/incorrect states on the draggable objects. And, it's actually the drop target that needs to change its state when the draggable item returns to its starting location. As a workaround, I've added a transparent rectangle over most of my screen and added a trigger to change the state of the drop target when the draggable object is dragged over the rectangle, but it's not working perfectly. Appreciate your response.