diff --git a/overnight.py b/overnight.py
index 6efbb5c..f26f2af 100644
--- a/overnight.py
+++ b/overnight.py
@@ -1204,3 +1204,23 @@ def overnight():
 
 
 
+
+def smooth_attenuator():
+    photon_energies = [525, 600]
+    iterations = range(24)
+
+    for p in photon_energies:
+        und.set(p).wait()
+        und.set(p).wait()
+        for i in iterations:
+            name = f"n2o_{p}eV_{i:02}"
+            print(name)
+            daq.acquire(name, n_pulses=60000)
+
+    print("close shutter")
+    shutter.close()
+
+
+
+
+