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Anyway, I was standing watching grass grow, (boring I know- but Real Madrid were playing Bayern Munich on TV, so I was catching bits of that).
I made a ladder of dirt down to the bottom of the ravine I dwell in, to make a grass carpet at the bottom.
It went like this:
Dirt = D
Torch = T
DT
TD
DT
TD etc.
Right before my eyes, grass grew on a block like so:
Grass spawn on the dirt = G
-------------GDT
-------------TD
-------------DT
-------------TDG
I realise it's one more square than an actual knights move in chess, before you point that out.