diff --git a/src/laser-feedbacks.py b/src/laser-feedbacks.py
index 74b10e41ea6eaa93fd147ae849d8d728a6ae2669..b1a2365cd6b0bf034baa096cad0d5e8fc0da54e7 100755
--- a/src/laser-feedbacks.py
+++ b/src/laser-feedbacks.py
@@ -13,16 +13,13 @@
 #    self.timer.stop()
 #AttributeError: 'MainWindow' object has no attribute 'timer'
 
-
-
-import os
 import PyTango
 from PyQt4.QtCore import *
 from PyQt4.QtGui import *
-import csv
+import os
 
-sogliauno = 70
-sogliadue = 90
+sogliauno = 70 # % per sfondo giallo
+sogliadue = 90 # % per sfondo rosso
 
 dev = {}
 dev['calendario_sl'] = PyTango.DeviceProxy('sl/laser/calendar_sl.01')