farm.lua

seconds = 1
minutes = 60
hours = 120

toolSlot = 1
fuelSlot = 16

function fuelUp()
    turtle.select(fuelSlot)
    turtle.refuel(1)
    turtle.select(toolSlot)
end

function wait(time, interval)
    delay = time * interval
    sleep(delay)
end
grid = {x = 2, y = 1}

turtle.select(toolSlot)
while true do
    if turtle.getFuelLevel() < 1 then
        fuelUp()
    end
    for i=0, grid.y do
        for i=0, grid.x do
            turtle.forward()
            _, data = turtle.inspectDown()
            if data.metadata == 3 then
                turtle.placeDown()
            end
        end
        turtle.turnRight()
        turtle.forward()
        turtle.turnRight()
    end
    wait(30, seconds)
end