Module:CladeN

local p = {}

function p.main(frame)

   local args = frame:getParent().args
   local output = {}
   local indent = 0

table.insert(output, '

')

   for i = 1, 20 do
       local label = args[i]
       if label then
           local spaces = string.rep("    ", indent)
           table.insert(output, spaces .. label .. '
')
           indent = indent + 1
       end
   end

table.insert(output, '

')

   return table.concat(output, "\n")

end

return p