diff --git a/lib/LeapFrog.py b/lib/LeapFrog.py
index 43e943e..3d882f3 100644
--- a/lib/LeapFrog.py
+++ b/lib/LeapFrog.py
@@ -67,7 +67,7 @@ def leapfrog(dyn_syst, bin_syst, duration, dt, recover_param=False, display=Fals
                 d.on_running(dyn_syst, step=step, label="{0:.2f} years".format(j*dt/yr))
     if display:
         d.close()
-        if not savename is None:
+        if gif:
             system("convert -delay 5 -loop 0 tmp/??????.png tmp/temp.gif && rm tmp/??????.png")
             system("convert tmp/temp.gif -fuzz 10% -layers Optimize plots/{0:s}_dynsyst.gif".format(savename))
 
diff --git a/lib/hermite.py b/lib/hermite.py
index 8d1cfdd..4ae1aa5 100644
--- a/lib/hermite.py
+++ b/lib/hermite.py
@@ -114,7 +114,7 @@ def hermite(dyn_syst, bin_syst, duration, dt, recover_param=False, display=False
                 d.on_running(dyn_syst, step=step, label="{0:.2f} years".format(j*dt/yr))
     if display:
         d.close()
-        if not savename is None:
+        if gif:
             system("convert -delay 5 -loop 0 tmp/??????.png tmp/temp.gif && rm tmp/??????.png")
             system("convert tmp/temp.gif -fuzz 10% -layers Optimize plots/{0:s}_dynsyst.gif".format(savename))
 
diff --git a/main_concurrent.py b/main_concurrent.py
index 94e8f14..ec93d96 100755
--- a/main_concurrent.py
+++ b/main_concurrent.py
@@ -29,7 +29,7 @@ def main():
     v = np.array([v1, v2, v3],dtype=np.longdouble)
 
     #integration parameters
-    duration, step = 5000.*yr, np.array([10./(365.25)],dtype=np.longdouble)*yr #integration time and step in seconds
+    duration, step = 100.*yr, np.array([1./(365.25)],dtype=np.longdouble)*yr #integration time and step in seconds
     step = np.sort(step)[::-1]
     integrator = "leapfrog"
     n_bodies = 3