Torch Placer ComputerCraft

torchName = "minecraft:torch"

args = { ... }

if #args < 2 then
    print("Usage: placeTorches <width> <length> <left or right>(default right)")
    return
end

if (args[3] == "left") then
    rightSide = false
elseif (args[3] == "right") then
    rightSide = true
else
    print("Agrument 3 Unrecognized: must be either 'left' or 'right'")
    return
end

function forward(dist)
    refuelTo(dist)
    for i = 1, dist do
        while turtle.forward() == false do
            if turtle.dig() == false then
                turtle.attack()
            end
        end
    end
end

function up(dist)
    refuelTo(dist)
    for i = 1, dist do
        while turtle.up() == false do
            if turtle.digUp() == false then
                turtle.attackUp()
            end
        end
    end
end

function down(dist)
    refuelTo(dist)
    for i = 1, dist do
        while turtle.down() == false do
            if turtle.digDown() == false then
                turtle.attackDown()
            end
        end
    end
end

function selectTorches()
    for i = 1, 16 do
        if turtle.getItemCount(i) ~= 0 then
            if turtle.getItemDetail(i).name == torchName then
                turtle.select(i)
                return i
            end
        end
    end
    return -1
end

function refuelTo(level)
    turtle.select(1)
    while turtle.getFuelLevel() < level do
        if turtle.refuel(1) == false then
            print("No Fuel! Add more to continue.")
            while turtle.refuel(1) == false do
                os.sleep(5)
            end
        end
    end
end

function placeTorch()
    if selectTorches() == -1 then
        print("No Torches Left! Add more to continue.")
        while selectTorches() == -1 do
            os.sleep(5)
        end
    end
    while turtle.placeDown() == false do
        if turtle.digDown() == false then
            turtle.attackDown()
        end
    end
end

function placeLine(torches)
    forward(7)
    placeTorch()
    for i = 1, (torches - 1) do
        forward(14)
        placeTorch()
    end
end

function torchesInLength(length)
    return math.floor((length - 8) / 14) + 1
end

function columnsInWidth(width)
    return math.floor((width - 1) / 7) + 1
end

function placeArea(columns, torches, right)
    for i = 1, columns do
        placeLine(torches)

        if i == columns then
            return
        end

        if right == true then
            turtle.turnRight()
            forward(7)
            turtle.turnRight()
        else
            turtle.turnLeft()
            forward(7)
            turtle.turnLeft()
        end
    right = (not right)
    end
end

torchLength = torchesInLength(tonumber(arg[1]))
torchColumns = columnsInWidth(tonumber(arg[2]))

refuelTo(tonumber(arg[2]))
up(1)
placeArea(torchColumns, torchLength, rightSide)
print("Complete!")