Are you having trouble finding slime or just tired of waiting for them to spawn? If the answer to the question is yes, please read this article and it will tell you step by step on how to make a slime spawning farm on Minecraft 360.
The first thing that you have to do to make a slime farm is to get supplies. All that you need is pickaxes. However, it will go faster if you use iron, stone, gold, or diamond pickaxes. Aside from that, ladders so you are able to get back up. You will need about 15 pickaxes, 40 ladders, and 50 torches. Once you gathered all of them, dig straight down, placing ladders on your way down. Please watch for lava because it may be right underneath you. Once you hit bedrock, head up 3 blocks.
Then, dig into the wall. The room you are able to make should be a 16×16 room, completely empty except for torches here and there. This one should be 3 blocks high. Please check the room you made. This one should be at least 3 blocks high and at least 16×16 and empty except for torches. After that, go to a wall, any wall. You need to go to the second block up from the floor and break that block. Then, head up two blocks over and break that block. You need to go horizontally around the whole room, leaving two blocks in between each hole in the wall.
The next thing that you have to do is to place torches in the walls. Do not forget to check. Take a note that the room should be 16×16, 3 high, and have that wall pattern. This one should be empty except for torches. Then, go to the roof. You will have to do what you did on the wall and break every other block, then place torches in them. Afterward, dig straight up about 3 blocks, you will have to duplicate the room you just created, but 2-3 blocks above it. Please repeat steps 1-10 in the room above the bottom one. Do not forget to check. There should be two rooms that are identical, 16×16 rooms, 3 high, with the patterns on the walls and roof, with torches inside each hole in the wall of roof.
When it is done, go back to the bottom room. You need to make this room 16 blocks wide and expand out to 26 blocks long. Again, check. Now, it should be two rooms, a top one 16×16 and a bottom one 16×26. The top one should have the patterns on the walls or roof, the patterns of the bottom one is able to be expanded out to the 26th block, but it is not a need as torches just keep other mobs from spawning. The steps to make a slime farm are still long so please check out Wiki if you want to find the complete one.