rmwater.lua

local input = {...}

if #input~=3 then
    print("Usage: rmwater <x> <y> <z>")
    return
end

local x = tonumber(input[1])
local y = tonumber(input[2])
local z = tonumber(input[3])

local function checkFuel()
    turtle.select(1)
    if turtle.getFuelLevel()==0 then
        while not turtle.refuel(1) do
            print("Waiting For Fuel...")
        end
    end
    turtle.select(2)
end

local function checkItemsAndPlace()
    turtle.select(2)
    local slot = 2
    while turtle.getItemCount()==0 do
        slot = slot + 1
        if slot>16 then
            slot = 2
        end
        turtle.select(slot)
    end
    turtle.placeDown()
end

local function span(x,y,z,vert,action)
    for i=1,y do
        for j=1,z do
            for k=1,x do
                action()
                    if k~=x then
                    checkFuel()
                    while not turtle.forward() do end
                end
            end
            if j % 2 == (x % 2 == 1 and 1 or i % 2) then
                turtle.turnRight()
                checkFuel()
                if j~=z then
                    while not turtle.forward() do end
                end
                turtle.turnRight()
            else
                turtle.turnLeft()
                checkFuel()
                if j~=z then
                    while not turtle.forward() do end
                end
                turtle.turnLeft()
            end
        end
        if i~=y then
            checkFuel()
            while not vert() do end
        end
    end
end

span(x,y,z,turtle.up,checkItemsAndPlace)
checkFuel()
while not turtle.forward() do end
turtle.turnRight()
while not turtle.forward() do end
turtle.turnLeft()

span(x-2,y,z-2,turtle.down,turtle.digDown)