A display device includes a base holder having a cavity and a roller assembly. The roller assembly can include an upper cylindrical roller, a lower cylindrical roller, a framework arranged and constructed to maintain the upper cylindrical roller and the lower cylindrical roller a predetermined distance away from each other, and a conveyor belt wrapped around the upper cylindrical roller and the lower cylindrical roller. At least one or more rotating mechanisms can be attached to one or more of a left side of the upper cylindrical roller, a right side of the upper cylindrical roller, a left side of the lower cylindrical roller, or a right side of the lower cylindrical roller, where the one or more rotating mechanisms drive the lower cylinder to rotate and cause the conveyer belt to move around the upper cylinder and the lower cylinder.