beetsucc

function getItemIndex(itemName)
    for slot = 1, 16, 1 do
        local item = turtle.getItemDetail(slot)
        if(item ~= nil) then
            if(item["name"] == itemName) then
                return slot
            end
        end
    end
end

function checkLeft()
    turtle.turnLeft()
    if (turtle.detect())
    then
        return true
    end
    turtle.forward()
    turtle.turnRight()
    return false
end

function zigzag()
    turtle.turnRight()
    turtle.forward()
    turtle.turnLeft()
    turtle.turnLeft()
    turtle.forward()
    end

function succ()
    for i = 1, 6, 1
    do
        turtle.suckDown()
    end
end

while(1)
do
    isBlock, data = turtle.inspectDown()

    if(isBlock)
    then
        if (data['state']['age'] == 7)
        then
            turtle.digDown()
            succ()
            potatoIndex = getItemIndex("minecraft:beetroots")
            turtle.select(potatoIndex)
            turtle.place()
            turtle.dropDown(turtle.getItemCount(potatoIndex) - 1)
        end
    else
        succ()
        potatoIndex = getItemIndex("minecraft:beetroot_seeds")
        turtle.placeDown()
    end


    if (checkLeft())
    then
        turtle.turnRight()
        while(not turtle.detect())
        do
            function zigzag()
        end
    end
end