Humidity hysteresis

[Domoticatorino]

Hi all,
what is wrong with this script below? It is a hysteresis for umidity value. Hence hysteresis value is 3 %.

Code:

value1 = grp.getvalue('2/4/4')
value2 = grp.getvalue('2/4/55')
isteresi = 3
    if value1 >= value2 then
     grp.write('0/0/6', true)
    else if value2 >= value1 - isteresi
   then
     grp.write('0/0/6', false)
 end
    end

Claudio