Redstone Alternative [Tutorial Map]

Redstone makes it possible for better interactive possibilities for creations you make. For example, you can create switches for gates to open and close them and many more things. Minecraft PE doesn't yet have the Redstone features but it shouldn't stop you from creating similar things. Even though it might not get as awesome as if you had Redstone this tutorial gives you great alternatives of what other things you can use to create similar setups.