Farmer

function FindCoalSlot()

    for i=1,16 do

        turtle.select(i)
        data = turtle.getItemDetail()
        if data ~= nil then
            if data.name == "minecraft:coal" then

                return true

            end
        end

    end

    return false

end

function FindSeedSlot()
    print("Finding Seed Slot")
    for i=1,16 do
        print("i is",i)
        turtle.select(i)
        data = turtle.getItemDetail()
        if data ~= nil then
            if data.name == "minecraft:wheat_seeds" then

                return true

            end
        end

    end

    return false

end

function FindCarrotSlot()
    print("Finding Carrot Slot")
    for i=1,16 do
        print("i is",i)
        turtle.select(i)
        data = turtle.getItemDetail()
        if data ~= nil then
            if data.name == "minecraft:carrot" then

                return true

            end
        end

    end

    return false

end

function RefillFuel()

    --This will get to a point where this will keep running if there is no coal
    FindCoalSlot()
    turtle.refuel()
    FindSeedSlot()

end


function LeftLoop()
    --Orient it for the next pass
    turtle.turnLeft()
    turtle.forward()
    turtle.turnLeft()
end

function RightLoop()
    --Orient it for the next pass
    turtle.turnRight()
    turtle.forward()
    turtle.turnRight()
end


function farm(dir)
    for i = 1,9 do
        success,data = turtle.inspectDown()
        if (success) then
            if (data.name == "minecraft:wheat") then
                if (data.metadata == 7) then

                    curItem = turtle.getItemDetail()
                    if curItem ~= "minecraft:seeds_wheat" then

                        FindSeedSlot()

                    end

                    local dug = false

                    while(not dug) do
                        print("harvesting wheat")
                        dug = turtle.digDown()
                    end
                    turtle.placeDown()
                end
            elseif (data.name == "minecraft:carrots") then
                if (data.metadata == 7) then

                    curItem = turtle.getItemDetail()
                    if curItem ~= "minecraft:carrot" then

                        FindCarrotSlot()

                    end

                    local dug = false

                    while(not dug) do
                        print("harvesting carrots")
                        dug = turtle.digDown()
                    end
                    turtle.placeDown()
                end
            end
        else
            turtle.placeDown()
        end
        turtle.suckDown()
        if (i ~= 9) then
            turtle.forward()
            if turtle.getFuelLevel() < 100 then
                print("Fuel Low! Refilling!")

                RefillFuel()

            end

        end

    end

    if dir == "L" then
        LeftLoop()
    elseif dir == "R" then
        RightLoop()
    else
        print("oof")
    end

end




for i = 1,100 do
    --first Pass
    farm("L")
    farm("R")
    farm("L")
    farm("R")
    farm("L")
    farm("R")
    farm("L")
    farm("R")
    farm("L")
    farm("R")
    farm("L")
    farm("R")
    farm("L")
    farm("R")
    farm("L")
    farm("R")

    --second pass
    farm("R")
    farm("L")
    farm("R")
    farm("L")
    farm("R")
    farm("L")
    farm("R")
    farm("L")
    farm("R")
    farm("L")
    farm("R")
    farm("L")
    farm("R")
    farm("L")
    farm("R")
    farm("L")

    os.sleep(120)
end

farm()