function GetSeeds()
    local count = 16
    repeat
        local currentSlot = turtle.getSelectedSlot()
        local data = turtle.getItemDetail(currentSlot)
        if data.name == "minecraft:wheat_seeds" then
            return true
        else
            turtle.select((currentSlot%16)+1)
            count = count - 1
        end
        currentSlot = turtle.getSelectedSlot()
        data = turtle.getItemDetail(currentSlot)
    until(count == 0)
    return false
end

function ReplaceSeed()
    local passed,data = turtle.inspectDown()
    if passed then
        if data.name == "minecraft:wheat" then
            if data.state.age == 7 then
                turtle.digDown()
                if GetSeeds() then
                  turtle.placeDown()
                else
                  print("OOF")
                end

            end
        end
    end
end

function ReturnHome(w)
    turtle.back()
    turtle.turnRight()
    for i=1,w,1 do
        turtle.forward()
    end
    turtle.turnLeft()
end

local w = arg[1] or 10
for i=1,w,1 do
    for j=1,w-1,1 do
        ReplaceSeed()
        turtle.forward()
    end
    if i%2 == 1 then
        ReplaceSeed()
        turtle.turnLeft()
        turtle.forward()
        turtle.turnLeft()
    else
        ReplaceSeed()
        turtle.turnRight()
        turtle.forward()
        turtle.turnRight()
    end
end
--ReturnHome(w)