Mining Turtle - Bridge

-- local width, length = 5, 5

local args = {...}

local width = 1
local length = 1
local currentSlot = 1
local paramsMet = false

if (#args == 2) then
    width = tonumber(args[1])
    length = tonumber(args[2])
    paramsMet = true
else
    print('Invalid size, please input width and length as X,Z')
end

if (paramsMet == true) then
    print ('Building bridge with length ' .. length .. '!')

    turtle.select(currentSlot)

    for i = 1, length do
        turtle.forward()
        turtle.placeDown()
        turtle.turnLeft()
        turtle.forward()
        turtle.placeDown()
        turtle.turnRight()
        turtle.turnRight()
        turtle.forward()
        turtle.forward()
        turtle.placeDown()
        turtle.turnLeft()
        turtle.turnLeft()
        turtle.forward()
        turtle.turnRight()
    end
end