diff --git a/script/Electric_field_loop.py b/script/Electric_field_loop.py
index 7cc9f55..e94930a 100644
--- a/script/Electric_field_loop.py
+++ b/script/Electric_field_loop.py
@@ -2,6 +2,8 @@ import os
 import traceback
 import thread
 import time
+import numpy as np
+import datetime
 
 #ID settings
 
@@ -26,19 +28,30 @@ Max = 14;
 Min=-Max;
 No_of_steps = 10;
 dB = Max/No_of_steps;
-
 Noavg = 5;
 
+
+forward=np.linspace(-14,14,7)
+reverse=np.linspace(14,-14,7)
+
+
+
 os.chdir("/sls/X11MA/data/X11MA/beamtime_december/")
 
 #forward loop
 
 file_prefix = time.strftime("%y%m%d")
-filename=open("data"+file_prefix+".txt","a")
-for i in range(0,No_of_steps):
-    B = -Max + 2*i*dB;
+time_prefix = datatime.datetime.fromtimstamp(ts).strftime('%H:%M:%s')
+filename=open("data"+file_prefix++time_prefix+".txt","a")
+
+#for i in range(0,No_of_steps):
+#    B = -Max + 2*i*dB;
+#    print "Setting field = ", B
+#    caput("X11MA-XMCD:I-SETraw",B)
+
+for i in range(o,len(forward))
     print "Setting field = ", B
-    caput("X11MA-XMCD:I-SETraw",B)
+    caput("X11MA-XMCD:I-SETraw",forward[i])
     
     temp_tey=0;
     temp_tey_E2 = 0;
@@ -90,11 +103,14 @@ for i in range(0,No_of_steps):
 
 #reverse loop
 
-for i in range(0,No_of_steps):
-    B = Max -2*i*dB;
-    print "Setting field = ", B
-    caput("X11MA-XMCD:I-SETraw",B)
+#for i in range(0,No_of_steps):
+    #B = Max -2*i*dB;
+    #print "Setting field = ", B
+    #caput("X11MA-XMCD:I-SETraw",B)
     
+for i in range(o,len(reverse))
+    print "Setting field = ", B
+    caput("X11MA-XMCD:I-SETraw",reverse[i])    
     temp_tey=0;
     temp_tey_E2 = 0;
     ADC2_temp_E1=0;