for _,name in ipairs({"red", "green", "white", "black", "blue", "brown", "cyan",
                    "grey", "dark_green", "woold:dark_grey", "magenta", "orange", "pink",
                    "red", "violet", "yellow"}) do
    local nodename = "wool:"..name
    local tmp = minetest.registered_nodes[nodename]
    if not tmp then
        return
    end
    local desc = tmp.description
    stairs.register_stair_and_slab("wool_"..name, nodename,
    tmp.groups,
    {"wool_"..name..".png"},
    desc.." Stair",
    desc.." Slab",
    tmp.sounds
    )
end