squiggly farm design

i like it because
- the only way you can trample your crops is if you jump
- blocks over the water so you don't have to walk over the crops
- fences a block up to double-prevent anything getting in
- all crops are on a path, no need to walk over crops to reach ones in the middle
not saying it's my original design though, it's probably been done before.
size isn't an issue here though since you really only need enough to sustain yourself on a single player world.