Double Quarry Digger

-- Made By Vilsol
-- DoubleQuarry Digger
-- Digs 2 blocks at a time
-- Digs double the depth amount

local args = { ... }

if not args[1] or not args[2] or not args[3] then
    print "Command:"
    print "doublequarry X Y Depth"
    error()
end

if not tonumber(args[1]) then
    print "X must be a number!"
else
    x = tonumber(args[1])
end
if not tonumber(args[2]) then
    print "Y must be a number!"
else
    y = tonumber(args[2])
end
if not tonumber(args[3]) then
    print "Depth must be a number!"
else
    d = tonumber(args[3])
end

if(turtle.getItemCount(13) == 0)then
    print "No EnderChest!"
    print "Put an EnderChest in the slot 13 and re-run the program!"
    error()
end

turn = "right"

totaldig = 0

function reFuel()
    fuel = turtle.getFuelLevel()
    if fuel < 100 then
        turtle.select(16)
        turtle.refuel()
        turtle.select(1)
    end
    fuel = turtle.getFuelLevel()
    if fuel < 100 then
        print "No Fuel!"
        print "Put Fuel in slot 16 and re-run the program!"
        error()
    end
end

function bringHome()
    turtle.digUp()
    turtle.select(13)
    if not turtle.placeUp() then
        for attacker = 1,50 do
            turtle.attackUp()
        end
    end
    for slots = 1, 12 do
        turtle.select(slots)
        turtle.dropUp()
    end
    turtle.select(13)
    turtle.digUp()
    turtle.select(1)
end

function checkSlot()
    fullness = turtle.getItemCount(12)
    if fullness > 0 then
        bringHome()
    end
end

function digQuarry()
    reFuel()
    bringHome()
    turtle.digDown()
    turtle.down()
    for depth = 1, d do
        checkSlot()
        for width = 1, y do
            checkSlot()
            for height = 2, x do
                checkSlot()
                if turtle.dig() then
                    totaldig = totaldig+1
                end
                if turtle.digDown() then
                    totaldig = totaldig+1
                end
                if not turtle.forward() then
                    reFuel()
                    if not turtle.forward() then
                        bringHome()
                        if not turtle.forward() then
                            if not turtle.attack() then
                                print "Error"
                                error()
                            end
                            if not turtle.forward() then
                                for times = 1,50 do
                                    turtle.attack()
                                end
                                if not turtle.forward() then
                                    print "Error"
                                    error()
                                end
                            end
                        end
                    end
                end
            end
            if width < y then
                if turn == "left" then
                    turn = "right"
                    turtle.turnLeft()
                    if turtle.dig() then
                        totaldig = totaldig+1
                    end
                    if turtle.digDown() then
                        totaldig = totaldig+1
                    end
                    if not turtle.forward() then
                        reFuel()
                        if not turtle.forward() then
                            bringHome()
                            if not turtle.forward() then
                                if not turtle.attack() then
                                    print "Error"
                                    error()
                                end
                                if not turtle.forward() then
                                    for times = 1,50 do
                                        turtle.attack()
                                    end
                                    if not turtle.forward() then
                                        print "Error"
                                        error()
                                    end
                                end
                            end
                        end
                    end
                    turtle.turnLeft()
                else
                    turn = "left"
                    turtle.turnRight()
                    if turtle.dig() then
                        totaldig = totaldig+1
                    end
                    if turtle.digDown() then
                        totaldig = totaldig+1
                    end
                    if not turtle.forward() then
                        reFuel()
                        if not turtle.forward() then
                            bringHome()
                            if not turtle.forward() then
                                if not turtle.attack() then
                                    print "Error"
                                    error()
                                end
                                if not turtle.forward() then
                                    for times = 1,50 do
                                        turtle.attack()
                                    end
                                    if not turtle.forward() then
                                        print "Error"
                                        error()
                                    end
                                end
                            end
                        end
                    end
                    turtle.turnRight()
                end
            end
        end
        if depth < d then
            if turtle.digDown() then
                totaldig = totaldig+1
            end
            if not turtle.down() then
                reFuel()
                if not turtle.down() then
                    bringHome()
                    if not turtle.down() then
                        if not turtle.attack() then
                            print "Error"
                            error()
                        end
                        if not turtle.down() then
                            for times = 1,50 do
                                turtle.attack()
                            end
                            if not turtle.down() then
                                print "Error"
                                error()
                            end
                        end
                    end
                end
            end
            if turtle.digDown() then
                totaldig = totaldig+1
            end
            if not turtle.down() then
                reFuel()
                if not turtle.down() then
                    bringHome()
                    if not turtle.down() then
                        if not turtle.attack() then
                            print "Error"
                            error()
                        end
                        if not turtle.down() then
                            for times = 1,50 do
                                turtle.attack()
                            end
                            if not turtle.down() then
                                print "Error"
                                error()
                            end
                        end
                    end
                end
            end
            turtle.turnLeft()
            turtle.turnLeft()
        else
            if turtle.digDown() then
                totaldig = totaldig+1
            end
            for goup = 1, d*2 do
                turtle.up()
            end
            bringHome()
        end
    end
end

digQuarry()