place

dir, depth, width = ...
if dir == nil then
    dir = 'down'
end
if depth == nil then
    depth = 2
end
if width == nil then
    width = 2
end

num_moves = depth*width
width_dir = 'right'
height_dir = 'up'
turn_again = false
switch_height_dir = false

function place()
    for i = 2, num_moves do
        print('forward')
        turtle.forward()
        if turn_again == true then
            if dir == 'down' or dir == 'up' then
                if width_dir == 'right' then
                    turtle.turnRight()
                    width_dir = 'left'
                elseif width_dir == 'left' then
                    turtle.turnLeft()
                    width_dir = 'right'
                end
            end
            turn_again = false
        end
        if i % depth == 0 then
            if dir == 'down' or dir == 'up' then
                if width_dir == 'right' then
                    turtle.turnRight()
                elseif width_dir == 'left' then
                    turtle.turnLeft()
                end
                turn_again = true
            end
        end
    end
end

function init()
    if dir == 'down' then -- start at ground level
        turtle.up()
        turtle.placeDown()
    elseif dir == 'up' then -- start from ceiling height level
        -- turtle.down()
        turtle.placeUp()
    place()
end

init()