Mine

hi = 2
dep = 35
wid = 35

whi = hi
wdep = dep
wwid = wid

if turtle.dig() then
end
turtle.forward()
turtle.turnLeft()

secnd = 0
stopdig = 0
secndlk = 0

if hi / 2 == math.floor(hi / 2) then
    turdigleft = 1
elseif hi / 2 ~= math.floor(hi / 2) then
    turdigleft = 0
end

blli = {
    "minecraft:cobblestone",
    "nifty:limestone",
    "nifty:basalt",
    "nifty:marble"
}


function invman()
    for i=1,#blli do
        bidis = i
        for i2=1,16 do
            --turtle.select(i2)
            itemcheckm = turtle.getItemDetail(i2)
            if turtle.getItemDetail(i2) ~= nil then
                if turtle.getItemDetail(i2).name == blli[bidis] then
                    turtle.select(i2)
                    turtle.dropDown(i2)
                end
            end
        end
    end
    --turtle.select(16)
    if turtle.getItemCount(16) > 0 then
        exitmine = 1
        os.exit()
    end
    turtle.select(1)

end




local function mantudir()
    secndlk = 0
    if secnd == 1 then
        if hi / 2 ~= math.floor(hi / 2) then
            if turdigleft == 1 then
                turdigleft = 0
            else
                turdigleft = 1
            end
        end
        secnd = 0
        secndlk = 1
    end
    if secndlk == 0 then
        secnd = 1
    end
end
local hidone = 0

local function redrawdig()
    term.clear()
    term.setCursorBlink(false)
    term.setCursorPos(1,1)
    print("Depth: "..wdep)
    term.setCursorPos(1,2)
    print("Hight: "..whi)
    term.setCursorPos(1,3)
    print("Width: "..wwid)
end
redrawdig()
local function turncurdig()
    if turdigleft == 0 then
        turtle.turnRight()
        mantudir()
    else
        turtle.turnLeft()
        mantudir()
    end
end
tddown = 1
local function turndig()
    local i = hi
    while i > 1 do
        if turtle.detectDown() then
            turtle.digDown()
        end
        if turtle.down() then
            i = i - 1
            if i < 2 then
                tddown = 1
            end
        end
    end
    turncurdig()
    while turtle.detect() do
        turtle.dig()
        invman()
    end
    turtle.forward()
    turncurdig()
end
if exitmine ~= 1 then
while wdep > 0 do
    if stopdig == 0 then
    while whi > 0 do
        while wwid > 1 do
            while turtle.detect() do
                turtle.dig()
                if exitmine == 1 then
                    break
                end
                invman()
            end
            if exitmine == 1 then
                break
            end
            if turtle.forward() then
                wwid = wwid - 1
            end
            redrawdig()
        end
        if exitmine == 1 then
            break
        end
        if whi > 1 then
            while turtle.detectUp() do
                turtle.digUp()
            end
            if turtle.up() then
                hidone = hidone + 1
            end
            if turtle.turnLeft() then
                hidone = hidone + 1
            end
            if turtle.turnLeft() then
                hidone = hidone + 1
            end
        end
        if exitmine == 1 then
            break
        end
        wwid = wid
        if hidone > 2 or whi < 2 then
            whi = whi - 1
        else
            term.clear()
            term.setCursorPos(1,1)
            print("Error")
            shell.exit()
        end
        hidone = 0
        redrawdig()

    end
    end
    if exitmine == 1 then
        break
    end
    if wdep > 1 then
        turndig()
    end
    if tddown > 0 or wdep < 2 then
        wdep = wdep - 1
        tddown = 0
    end
    if wdep < 1 then
        stopdig = 1
        break
    end
    whi = hi
    redrawdig()
end
end
print("Done")