farm

local args = {...}
local xSize = tonumber(args[2])
local ySize = tonumber(args[1])
local timeout = tonumber(args[3])

local function checkWheat()
    local isBlock, data = turtle.inspectDown()
    if isBlock and data.name == "minecraft:wheat" and data.metadata == 7 then
        turtle.digDown()
        turtle.select(1)
        turtle.placeDown()
    end
end

local function refuelIfEmpty() -- refuels if fuel level is 0
  if turtle.getFuelLevel() == 0 then
    print('Out of fuel\nWaiting for fuel in slot ' .. turtle.getSelectedSlot() .. '...')
    while not turtle.refuel do os.pullEvent('turtle_inventory') end
    print('Fuel level is: ' .. turtle.getFuelLevel())
  end
end

local function forward()
    checkWheat()

  while not turtle.forward() do
    refuelIfEmpty()
    if turtle.detect() then turtle.dig() end
  end
end

local function doPass()
    for n = 1, ySize do
        for m = 1, xSize -1 do
            forward()
        end

        if n < ySize then
            if n % 2 == 0 then
                turtle.turnRight()
                forward()
                turtle.turnRight()
            else
                turtle.turnLeft()
                forward()
                turtle.turnLeft()
            end
        end
    end

    if ySize % 2 ~= 0 then
        turtle.turnRight()
        turtle.turnRight()

        for n = 1, xSize -1 do
            turtle.forward()
        end
    end

    turtle.turnLeft()

for n = 1, ySize -1 do
            turtle.forward()
        end
end

local function useChest()
    for n = 2, 16 do
        turtle.select(n)
        turtle.drop()
    end
end
while true do
    doPass()
    turtle.turnRight()
    useChest()
    turtle.turnRight()
    turtle.turnRight()
    sleep(timeout or 25*60)
end