This is a demonstration of how simple and enjoyable small JITs (just-in-time compilers) can be. The word "JIT" tends to invoke an image of deepest wizardry, something that only teams of the most hard-core compiler guys would ever dream of creating. It makes you think of the JVM or .NET, very large runtimes with hundreds of thousands of lines of code. You never see "Hello, World!" sized programs for JITs that do something interesting in a small amount of code. This article is an attempt to change that.