Module:In5

 -- This module implements {{in5}}.

 local p = {}

 function p.in5(frame)
 local indent = frame.args[1]
 -- Trim whitespace and convert to number. Default to 5 if not present,
 -- as per the template title.
 indent = tonumber( mw.text.trim(indent) ) or 5
 -- Round down to nearest integer. Decimal values produce funky results
 -- from the original template, but there's no need for us to replicate that.
 indent = math.floor( indent )
 -- Don't output anything for zero or less. Again, there was some funky output
 -- here for negatives, but now we're in Lua we should use sane defaults.
 if indent <= 0 then
 return
 end
 
 local base = '&nbsp; '
 local modulo = '&nbsp;'
 
 --[[
  Indent values and the corresponding values for base and modulo:

  indent base modulo
  1 0 1
  2 0 2
  3 1 1
  4 1 2
  5 2 1
  6 2 2
  7 3 1
  8 3 2
  9 4 1
  10 4 2
 ]]
 
 local baseNum = math.floor( (indent - 1) / 2 )
 local modNum = math.fmod( indent - 1 , 2 ) + 1
 
 return mw.ustring.rep( base, baseNum) .. mw.ustring.rep( modulo, modNum )
 end

 return p