FloorMaker

-- Turtle will move forward and to the right.
-- Turtle will build below itself.

arg = {...}

length = tonumber(arg[1])
width = tonumber(arg[2])

currentSlot = 1
processMore = true

-- Usage
if (length == nil or width == nil) then
    print ("Usage: Program <length> <width>")
    print ("Length = Blocks forward.")
    print ("Width = Blocks to the right.")
    return
end

-- Checks if the turtle slot is empty
-- Going from slot to 16 wrapping (1 - 16)
function slotEmpty()
    for i=0,16,1 do
        newSlot = ((currentSlot + i) % 16) + 1
        if (turtle.getItemCount(newSlot) ~= 0) then
            currentSlot = newSlot
            turtle.select(newSlot)
            print("\nFound a block at ".. newSlot .. " carry on")
            return true
        end
    end
    print("\nI've run out of blocks, I will wait for more.")
    return false
end

for i=0,(width - 1),1 do
    for j=1,(length - 1),1 do
        processMore = slotEmpty()
        if processMore then
            turtle.forward()
            turtle.placeDown()
        end
    end

    if not processMore then
        print("I have run out of blocks to place, I will wait for more.")
        break
    end

    if (i % 2 == 0) then
        if (i ~= width - 1) then
            turtle.turnRight()
            turtle.forward()
            turtle.turnRight()
        end
    else
        if (i ~= width - 1) then
            turtle.turnLeft()
            turtle.forward()
            turtle.turnLeft()
        end
    end

    -- See if we have an item in any slot, if we do, then place it
    -- if we don't have any items, then we break out of the loop, cause we're done
    processMore = slotEmpty()
    if processMore then
        turtle.placeDown()
    else
        break
    end
end

print("\nMy programming indicates that the floor is completed.")