I'm working on a music visualizer. I baked the sound of a kick drum to an empty's z axis. I would like to access the position of the empty, of both the current frame and a previous frame or earlier point in time, in order to animate an object to visualize the sound. I know how to access the empty's current position, in order to affect the position of my visualizer object. However, can I also access the position of the empty a few frames earlier? I would like to create a "ghosting" effect, where a semi-transparent copy of my visualizer follows the original visualizer. In other words, the copy should be a few frames behind the original. Is this possible in geometry nodes?