[CC] 5+1 glass holes

if not turtle then
    printError( "Requires a Turtle" )
    return
end

local tArgs = { ... }
if #tArgs ~= 2 then
    print( "Usage: gh <length> <width>" )
    return
end

-- Mine in a quarry pattern until we hit something we can't dig
local length = tonumber( tArgs[1] )
local width = tonumber( tArgs[2] )

if length < 1 then
    print( "Length must be natural number" )
    return
end

if width < 1 then
    print( "Width must be natural number" )
    return
end

local depth = 0
local item = 1

local function refuel()
    local fuelLevel = turtle.getFuelLevel()
    if fuelLevel == "unlimited" or fuelLevel > 0 then
        return
    end

    local function tryRefuel()
        for n=1,16 do
            if turtle.getItemCount(n) > 0 then
                turtle.select(n)
                if turtle.refuel(1) then
                    turtle.select(1)
                    return true
                end
            end
        end
        turtle.select(1)
        return false
    end

    if not tryRefuel() then
        print( "Add more fuel to continue." )
        while not tryRefuel() do
            os.pullEvent( "turtle_inventory" )
        end
        print( "Resuming floor building..." )
    end
end

local function charge()
    local function tryCharge()
        for n=1,16 do
            if turtle.getItemCount(n) > 0 then
                if turtle.getItemDetail(n).name == "chisel:glass" then
                    turtle.select(n)
                    return true
                end
            end
        end
        turtle.select(2)
        return false
    end
    if not tryCharge() then
        print( "Add more material to continue." )
        while not tryCharge() do
            os.pullEvent( "turtle_inventory" )
        end
        print( "Resuming floor building..." )
    end
end

local function tryForward()
    refuel()
    while not turtle.forward() do
        if turtle.detect() then
            if not tryDig() then
                return false
            end
        elseif turtle.attack() then
        else
            sleep( 0.1 )
        end
    end
    return true
end

local function tryUp()
    refuel()
    while not turtle.up() do
        if turtle.detectUp() then
            if not tryDigUp() then
                return false
            end
        elseif turtle.attackUp() then
        else
            sleep( 0.1 )
        end
    end
    return true
end

local function tryDigDown()
    while turtle.detectDown() do
        if turtle.digDown() then
            sleep(0.1)
        else
            return false
        end
    end
    return true
end

local function tryDown()
    refuel()
    while not turtle.down() do
        if turtle.detectDown() then
            if not tryDigDown() then
                return false
            end
        elseif turtle.attackDown() then
        else
            sleep( 0.1 )
        end
    end
    return true
end

local function tryPlaceDown()
    refuel()
    charge()
    while not turtle.detectDown() do
        if turtle.placeDown() then
            sleep(0.1)
        else
            return false
        end
    end
    return true
end

print( "Building the floor..." )

local function buildForward(dir)
    for n=1,dir do
        for x=1,6 do
            tryForward()
        end
        tryDown()
        tryDigDown()
        tryUp()
        tryPlaceDown()
    end
end

local frwDir = true;

tryDown()
tryDigDown()
tryUp()
tryPlaceDown()

length = length - 1
width = width - 1

while (length > 0 or width > 0) do
    if frwDir == true then
        buildForward(length)
        width = width - 1
        frwDir = false
    else
        buildForward(width)
        length = length - 1
        frwDir = true
    end
    turtle.turnRight()
end

print( "Floor building complete" )