I know that Einstein said that gravity is the curvature of spacetime, but I'm a bit confused as to what happens as a massive body moves through space. When a body is in a certain position, it warps that area of space, but as it moves past that particular area, how does the area of space that was just previously warped move back into its original place. For example, people like to use the ball on a bedsheet example. The reason that the bedsheet moves back into its original position is due to the tension or pulling of the edges. Does spacetime exhibit such forces? I apologize if this question is trivial or dumb, but I was just curious.