Often for the long building in Minecraft PE player needs to finish a large number of building materials. Cobblestone is one of them. It is difficult to mine each unit separately. Therefore, it would be reasonable to use engineering structure called generator cobblestones. To build the device is not difficult. All the user needs a little patience and ingenuity. The usual generator in the ground are doing in this way:
Take a pick and start digging. At first dig in the ground a hole into one unit. Then, on the right side of it dig distance equal to six such blocks, and on the left — the hole is equal to one unit. Further, the initial hole dig the distance also equals one unit. Then, in the left aperture pour a bucket of lava, and in the right a bucket of water. Thus, to form the flow of the two fluids next to each other. The collision of flows and will be cobblestones. To take which can be in a free hole from the front, pre-breaking the previous block.
If an ordinary generator build failed, you can build a generator out of stone or of glass blocks. In the case for the first device the player need 17 stone blocks, a bucket of lava and water, and the second 22 pieces of glass and with the same amount of liquids.