Turtle Cube v1.1

-- WORKS ONLY IN VERSION 1.13 OR NEWER!

-- Basicaly write *yourprogram* CubeDepth CubeWidth CubeHeight - for example | mine 2 2 | mines out cube 2x2x1
-- Takes negative dimensions in all directions too!
args={...}
x=tonumber(args[1])
if x == nil then
    x=1
end
y=tonumber(args[2])
if y == nil then
    y=1
end
z=tonumber(args[3])
if z == nil then
    z=1
end
moves=0

-- Few functions so that the code is "easier" to code  (this mainly includes weird exceptions and failsafes (For example mob blocking turtle or falling blocks))
function midPrint(text,color)
    term.setBackgroundColor(color)
    term.clear()
    local r,t=term.getSize()
    t=t/2+1
    r=(r/2)-(string.len(text)/2)+1
    term.setCursorPos(r,t)
    print(text)
end
function Forward()
    while not turtle.detect() and not turtle.forward() do
        midPrint("Blocked!",colors.red)
    end
end
function Dig()
    while turtle.detect() do
        turtle.dig()
    end
end
function Up()
    while not turtle.detectUp() and not turtle.up() do
        midPrint("Blocked!",colors.red)
    end
end
function DigUp()
    while turtle.detectUp() do
        turtle.digUp()
    end
end
function Down()
    while not turtle.detectDown() and not turtle.down() do
        midPrint("Blocked!",colors.red)
    end
end
function DigDown()
    while turtle.detectDown() do
        turtle.digDown()
    end
end

-- Negative coords logic conversion
yOdd=false
if z<0 then
    Zneg=true
    z=z*(-1)
end
if y<0 and x>0 then
    turtle.turnLeft()
    local Ymem=y
    y=x
    x=Ymem*(-1)
elseif y<0 and x<0 then
    turtle.turnLeft(2)
    yOdd=true
    local Ymem=y
    y=x*(-1)
    x=Ymem*(-1)
elseif y>0 and x<0 then
    turtle.turnRight()
    local Ymem=y
    y=x*(-1)
    x=Ymem
end

--Refueling   (My best attempt to make this not crash the code)
while turtle.getFuelLevel()<(x*y*z) do
    local InventorySlot=16
    while turtle.select(InventorySlot) do
        midPrint(("Not enough fuel! ("..(math.ceil((x*y*z-turtle.getFuelLevel())/80)).." Required)"),colors.red)
        if turtle.getItemDetail() then
           if (tostring(turtle.getItemDetail().name)=="minecraft:coal") then
               break
           end
        end
        InventorySlot=InventorySlot-1
        if InventorySlot==0 then
            InventorySlot=16
            sleep(1)
        end
    end
    if (tostring(turtle.getItemDetail().name)=="minecraft:coal") then
        turtle.refuel(math.ceil((x*y*z-turtle.getFuelLevel())/80))
        if turtle.getFuelLevel()>(x*y*z) or turtle.getFuelLevel()==(x*y*z) then
            break
        end
    end
end
-- Main loop
l=false
for i=z-1,0,-1 do
    for m=y-1,1,-1 do
        for n=x-1,1,-1 do
            Dig()
            Forward()
            moves=moves+1
            midPrint((tostring(math.floor((moves/(x*y*z))*1000)/10).."%"),colors.green)
        end
        if not yOdd then
            if not l then
                yOdd=true
                turtle.turnRight()
            end
            if x==1 and not l then
                yOdd=false
                l=true
            end
            Dig()
            Forward()
            moves=moves+1
            midPrint((tostring(math.floor((moves/(x*y*z))*1000)/10).."%"),colors.green)
            if not l then
                turtle.turnRight()
            end
        else
            yOdd=false
            turtle.turnLeft()
            Dig()
            Forward()
            moves=moves+1
            midPrint((tostring(math.floor((moves/(x*y*z))*1000)/10).."%"),colors.green)
            turtle.turnLeft()
        end
    end
    for n=x-1,1,-1 do
        Dig()
        Forward()
        moves=moves+1
        midPrint((tostring(math.floor((moves/(x*y*z))*1000)/10).."%"),colors.green)
    end
    if i>0 then
        if Zneg then
            DigDown()
            Down()
            moves=moves+1
            midPrint((tostring(math.floor((moves/(x*y*z))*1000)/10).."%"),colors.green)
            if x>1 or y>1 then
                turtle.turnLeft()
                turtle.turnLeft()
            end
        else
            DigUp()
            Up()
            moves=moves+1
            midPrint((tostring(math.floor((moves/(x*y*z))*1000)/10).."%"),colors.green)
            if x>1 or y>1 then
                turtle.turnLeft()
                turtle.turnLeft()
            end
        end
    end
end
midPrint("Complete",colors.blue)
term.setCursorPos(1,1)