for yd in 1 0.5 0.2 do for dt in 0.01 0.0001 do echo $yd $dt orbit_euler.py 1 0 0 $yd $dt 40 1 > kep.ydot$yd.eul.dt$dt orbit_leapfrog.py 1 0 0 $yd $dt 40 1 > kep.ydot$yd.leap.dt$dt done done