minecraft personal achivement and plan!

hey every one! i've recently made a roller coaster that goes from my house, to the inside of my mine and out! it's not finished though, i'm working on it exiting my mine, but once it's finished, i'll hope to have a video of it! my computer isn't so great so the quality might be bad, but i hope you enjoy it! HOW I GOT ALL THAT IRON: i made stairs that lead all the way to bedrock, then, any where you want, you dig a 2 square high hole on the wall of the stairs, then make a room 5x5x5 big, make many of these, and soon you'll find lots of iron! you may also find lots of coal, gold, redstone, and sometimes, DIAMONDS (even though i havent found any diamonds yet :P)!

here's a picture,

that's the plan, wanna do it?