The multi-piston looks like a smooth andesite block with a hole in each face. It lets you move multiple blocks at a time.
The Multi-Piston’s GUI
Place the multi-piston beside, above, or below the blocks you want to move, then right-click it to open the GUI.
You will see 4 blue arrows, a + and a - with Range: and Speed: in the center. The arrows refer to the cardinal directions, up for North, down for South, right for East, and left for West. The + is to raise and the - is to lower. The range is 10 blocks and the speed: is 1-3, 3 being the fastest.
You will need to left-click on one of the arrows, +, or - and it will turn green. This shows the directions the blocks will move when the multi-piston is activated by redstone. Then right-click on another arrow, +, or - for the direction the blocks will move when the redstone signal is off. This arrow will turn red.
Note: To set the red arrow, the blocks that you want to move must already be there.
Note: All blocks being moved must be the same in order to work.
Note: There must be enough room for all the blocks to move or it will stop.