Frames allow unique movement patterns for Minecraft blocks. When moved by a Frame Motor, all connected Frames will move as a unit and drag almost every block touching a frame. If a non-frame block connected to a frame is blocked from moving by another block, the entire assembly will not move. Frames can be given different looks by putting microblocks inside the frame. Covers will act as an insulation and prevent that particular side of a frame from dragging blocks when moved. Cover textures hide the crossbars on the covered side, but not the block borders.