ladder

--file:ladder
--pastebin:wc6RNHeV

targs = {...}
os.loadAPI("movement")

local m = movement
local ladderSlot = 1
local wallSlot = 2
m.reservedslots = 2


if ( #targs ~= 2 ) then
    print("Usage : ladder <up|down> <count>")
    print("Slot 1 : Ladders.")
    print("Slot 2 : Walls")
    return
end

local direction = targs[1]
local count = tonumber(targs[2])

if (turtle.getItemCount(ladderSlot)< count) then
    print("not enough ladders in slot 1.")
    return
end

if (turtle.getItemCount(wallSlot)< count) then
    print("not enough walls in slot 2.")
    return
end


for i=1,count do
    m.turtleForward()
    m.paintForward(wallSlot)
    turtle.back()
    m.selectMaterial(ladderSlot)
    turtle.place()
    if direction == "up" then
        m.turtleUp()
    else
        m.turtleDown()
    end
end

-- return
for i=1,count do
    if direction == "up" then
        m.turtleDown()
    else
        m.turtleUp()
    end
end