Milker

local function getMilk()

    for i = 1, 16 do

        local item = turtle.getItemDetail(i)
        if item and item.name == "minecraft:bucket" then

			turtle.select(i)

			for j = 1, item.count do

                turtle.place()

            end
        end

		local item = turtle.getItemDetail(i)
        if item and item.name == "minecraft:milk_bucket" then

            turtle.select(i)
            turtle.dropDown()

        end
    end
end

getMilk()

while true do

    os.pullEvent("turtle_inventory")
    getMilk()

end