modify only the shape of the gravel area around the fountain currently the gravel area is a circular shape centered on the fountain change this so that the gravel area is no longer a full circle instead the gravel area should expand and fill the entire region marked by the blue outline the front half area only forming a half circle semi oval shape that follows the blue boundary lines the fountain remains centered within this new gravel area keep all materials textures plants and layout exactly the same do not add or remove any elements only adjust the boundary shape of the gravel area to match the blue marked limits
