How do you defeat gringotts break-in?

Ok. To begin, you will be in front of the dragon. Go to the left until you see parts next to pieces that are red and black(those objects aren't important yet). You will see a gray sack hanging further ahead. There is a button close to it. You need to stand on it to break the sack and get a tricycle wheel and a bell(I have no idea why it's a tricycle). The game will show you where to put it: the white marker. You can fix the tricycle in two ways: you can either press A, or select the purple spell and press Y. Move to the dragon and press Y over and over. The dragon will cover it's ears and a trail of studs will appear. Follow the trail until the trike stops. Quickly jump off the tricycle and go in. The vault appears, first find all the silver decor and destroy them to get the red brick. There is a scroll, move it onto the wall. There is a silver fire, destroy it. Use Auguamenti to clear the flames. Get on the pink pad and use Hermione and follow the directional arrow instructions. You will get a book, move it so it will snap in the lego creature's face and make it sneeze. It will sneeze out a gear(it's gross) and you levitate it onto the other gear. Go to the left of the vault. There is a green safe that Bogrod has to unlock.Remove the chest in front of it. DON'T FORGET TO COLLECT THE LIGHT USING THE DELUMINATOR! When the cups multiply, it will be VERY difficult to get the light. Once you have unlocked it, move the gears and a hand will come out from the upper right and open the chest. Let the cups multiply and glow red. Then jump on where the red brick was, and jump on the chests until there is a huge gap where you need to levitate the chests. Do so, and jump quickly, the chests will sink. When you get up to the unlit lamp, obviously you need to light it. The red hotness will go away and you can get the horcrux. It's safe to walk on the pile of cups. Exit the vault. A hammer will fall out of nowhere,but go get back on the tricycle. Distract the dragon until you get to the hammer. Levitate the hammer,it will break the lock. Then you can levitate the locks in the chain. Walk to the dragon, it's the easiest way to get to the other chain. You will get destroyed, but you can get the horcrux back. Use Bogrod for the safe on the left side(you don't need the tricycle). There will be a lamp. Use the deluminator, then use Bogrod to lower the other lamp. Release the light to the lamp near the chain. Go back to the safe and use Bogrod to move the lamp up to the Devil's Snare plant. The plant will disappear. Levitate the locks. There should be a clip. If not, go get the horcrux near the vault entrance(make sure you use the tricycle).