This is a really cool build it is an aquarium where fish swim around. I made it in the xbox360. Hope you enjoy.
Step 1: What You Need
What you need is
126 black clay
4 dead bushes
2 cooked fish
2 raw fish
4 redstone torches
1 redstone repeater
1 redstone comparator
1 redstone dust
4 blocks for the red stones I used lime stained clay.
First what you do is replace the floor with sand 5x8. Man in the back corners make what you see in picture 2. Then in the middle between them put a double chest.
On the right next to the double chest put a hopper pointing back words. On the 2nd block from the right put a ice block with vines on it. Next to it put a dead bush. In front of the hopper place 2 ice blocks then place vines on the back of the ice then break the bottom block.
Forward one block and to the left of the double chest place another ice blocks and lines on the back of them. In place glass blocks over the to back dead bushes that you just placed and 1 over the chest but forward one block. Now in the block you chose (I used black stained clay) replace some of the blocks around the edge of the sand like you see in picture 2. Then on those clay blocks place ice 3 high. Now next to the 3 high ice you just placed make place 3 high clay and 2 wide Do this on both sides.
Now using your ice blocks you are going to place them along the side of the right wall heading downwards then going to the front wall and then down to the ground heading towards the hoppers. This is where your water will go so your fish swim.
Now where your first hopper you place is place another to hoppers but these two pointing to the right. Where these two hoppers lead place 3 droppers (not dispensers) pointing up. Then to the left of the droppers dig a hole 2 wide and 3 more long it needs to be too deep as well. And break the block under the bottom dropper.
To the left of the dropper one block down place a block then on that block place a comparator. Then place a block to the left of the comparator and on the back of it place a redstone torch.
Right under that torch place a piece of redstone dust. Place a redstone repeater heading into the block that the comparator is on. Place a redstone torch under the bottom dropper.
Place a block over the Redstone torch and place a nother redstone torch on the right side. Place a block over the redstone torch you just placed and place another redstone torch on it to the left of the dropper. All the Redstone should now be working so if you want to you can throw anything into the hopper and it will pop out of the top dropper. If it does not you did something wrong.
Now put a little casing around the top dropper and place water over the dropper and it should go through the little thing you made earlier and stop right before the vine and the hopper.
Now put a roof over the whole thing except for right above the double chest where the double chest is place glowstone right over that hole not in it because it might melt the ice.
Now put your fish one at a time in the bottom dropper and then watch them go. You are now done. I hope you enjoyed this instructable. Don't forget to vote.