Floorbuilder v1

local select_slot = 0

local ender_chest_slot = 1

local forward_motion = 0
local left_motion = 0

local left_right = "right"

term.write("Insert Length: ")
Length = tonumber(read()) - 1
print(" ")

term.write("Insert Width: ")
Width = tonumber(read())
print(" ")

local Length = Length
local Width = Width

function strip()
    if left_motion % 2 == 0 then
        while forward_motion ~= Length do
            selectSlot()
            turtle.placeDown()
            turtle.forward()
            forward_motion = forward_motion + 1
        end
    else
        while forward_motion ~= 0 do
            selectSlot()
            turtle.placeDown()
            turtle.forward()
            forward_motion = forward_motion - 1
        end
    end
end

function turn()
    if left_motion % 2 == 0 then
        turtle.turnRight()
        turtle.placeDown()
        turtle.forward()
        left_motion = left_motion + 1
        turtle.turnRight()
    else
        turtle.turnLeft()
        turtle.placeDown()
        turtle.forward()
        left_motion = left_motion + 1
        turtle.turnLeft()
    end
end

function selectSlot()
    for q=1,16 do
        local item_detail = turtle.getItemDetail(q)
        if item_detail then
            select_slot = q
            break
        end
    end
    turtle.select(select_slot)
end

print("STARTING")
while left_motion ~= Width do
    strip()
    turn()
end