I'm making a map for minecraft version 1.11.2 that requires a custom boss health bar (like the wither's, but with a different name) that will go down when a zombie pigman is killed.
I know there was a way to do it in 1.8, they patched it in 1.9, but what some don't know is that it's back in 1.11. And I don't understand it.
I'm sort of a newcomer to commands. Can somebody give me, sort of, step-by-step or noobified instructions on how to do it? I will need multiple different ones throughout the map as well, so keep that in mind. And don't use fancy terms like "hooked up to a clock" (actually just don't use that term because I have no idea what it means. Others are fine.)
I'm looking for an expert's answer. If you're not an expert, don't try to look smart by asking for more information and saying you know how to do it.