This chunk loader will keep a square area around itself loaded. By default it is a radius of 5. Using this will allow you to keep parts of your world loaded at all times so, crops will still grow, furnaces will run, etc.
Shaped Recipe
ObsidianAccepts any obsidianObsidianAccepts any obsidianObsidianAccepts any obsidianBlaze RodBlock of DiamondAccepts any blockDiamondEnder PearlAccepts any enderpearlObsidianAccepts any obsidianObsidianAccepts any obsidianObsidianAccepts any obsidian