On this map you can see the display, which operates under the action of a huge Redstone circuits. The screen can display a specified number (1 to 9) or an English letter (A to Z). The display possibilities are quite small, but attached to the large-scale structure shocks. If You are a novice in the construction of Redstone mechanisms, it is likely that You are interested in the device represented by device. Outside You'll be able to get a better look at the schema and understand how the functioning display.