/gps/particle gamma
# square plane source
/gps/pos/type Plane
/gps/pos/shape Square
/gps/pos/centre 1. 2. 1. cm
/gps/pos/halfx 2. cm
/gps/pos/halfy 2. cm
#cosine-law distribution
/gps/ang/type cos
# linear energy distr.
/gps/ene/type Lin
/gps/ene/min 2. MeV
/gps/ene/max 10. MeV
/gps/ene/gradient 1.
/gps/ene/intercept 1.

# commands below are independent of gps
#
/analysis/filename test2.aida
/analysis/maxeng 15 MeV
/analysis/mineng 1 MeV
/analysis/maxpos 5 cm 
/analysis/minpos -5 cm
/event/printModulo 10000
#/control/execute display.mac
/run/beamOn 10000