diff --git a/.DS_Store b/.DS_Store
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Binary files a/.DS_Store and b/.DS_Store differ
diff --git a/Hcal/.DS_Store b/Hcal/.DS_Store
index aa15bc8bc..71cc5ed3f 100644
Binary files a/Hcal/.DS_Store and b/Hcal/.DS_Store differ
diff --git a/PythonScript/electronGun.py b/PythonScript/electronGun.py
new file mode 100644
index 000000000..6a658a932
--- /dev/null
+++ b/PythonScript/electronGun.py
@@ -0,0 +1,64 @@
+from LDMX.Framework import ldmxcfg
+p=ldmxcfg.Process("electron")
+p.libraries.append("libSimCore.so")
+p.libraries.append("libHcal.so")
+p.libraries.append("libEcal.so")
+
+import argparse, sys
+parser = argparse.ArgumentParser(f'ldmx fire {sys.argv[0]}')
+parser.add_argument('energy',type=float)
+parser.add_argument('nevents',default=100,type=int)
+arg = parser.parse_args()
+
+#nevents = 1000 # number of events
+energy = arg.energy
+nevents = arg.nevents
+
+from LDMX.SimCore import simulator
+from LDMX.SimCore import generators
+sim = simulator.simulator("single_electron")
+sim.setDetector( 'ldmx-det-v12' , True )
+sim.description = "HCal electron"
+sim.beamSpotSmear = [20., 80., 0.] #mm
+#sim.beamSpotSmear = [100., 100., 0.] #mm
+particle_gun = generators.gun( "single_electron_upstream_hcal")
+particle_gun.particle = 'e-'
+#position = 870.
+position = 690.6 # back hcal
+#position = 240.4 # ecal face
+#position = 0.0
+particle_gun.position = [ 0., 0., position ]  # mm
+particle_gun.direction = [ 0., 0., 1.]
+particle_gun.energy = energy
+myGen = particle_gun
+print(myGen)
+sim.generators.append(myGen)
+
+#p.outputFiles=['data/ngun_%.2fmm_%.2f_gev.root'%(position,energy)]
+p.maxEvents = nevents
+#p.outputFiles = ["eGun2_" + str(p.maxEvents) + "_smear_" + str(sim.beamSpotSmear[0]) 
+                 #+ ", " + str(sim.beamSpotSmear[1]) + "_events_zpos_" + str(position) +".root"]
+
+p.outputFiles = ["eGun2_" + str(p.maxEvents) + ".root"]
+p.run = 11
+p.sequence=[sim]
+
+import LDMX.Ecal.digi as ecal_digi
+import LDMX.Hcal.digi as hcal_digi
+
+from LDMX.Ecal import EcalGeometry
+geom = EcalGeometry.EcalGeometryProvider.getInstance()
+
+from LDMX.Hcal import HcalGeometry
+geom = HcalGeometry.HcalGeometryProvider.getInstance()
+
+import LDMX.Hcal.hcal_hardcoded_conditions
+digit = hcal_digi.HcalDigiProducer()
+recon = hcal_digi.HcalRecProducer()
+
+import LDMX.Ecal.ecal_hardcoded_conditions
+p.sequence.extend([
+    ecal_digi.EcalDigiProducer(),
+    ecal_digi.EcalRecProducer(),
+    digit,recon
+])