Carrot

local t = turtle
local isBlock
local data
local toggle = true
local first = true

function refuel()
    t.select(1)
    t.refuel()
    t.select(2)
end

function purge()
    for slot = 3, 16, 1 do
        t.select(slot)
        t.dropDown()
    end
    t.select(2)
end

while true do
    for i = 0, 7, 1 do
        if (not first) then
        purge()
        if (toggle) then
            t.turnRight()
            t.forward()
            t.turnRight()
            toggle = false
        else
            t.turnLeft()
            t.forward()
            t.turnLeft()
            toggle = true
        end
        end
        for i = 0, 7, 1 do
            isBlock, data = t.inspectDown()
            if (isBlock) then
                if (data['state']['age'] == 7) then
                    t.digDown()
                    t.suckDown()
                    t.placeDown('minecraft:carrot')
                end
            end
            t.forward()
            refuel()
        end
        first = false
    end
    t.turnRight()

    for i = 0, 6, 1 do
        t.forward()
    end
    t.turnRight()

end