diff --git a/BloubWorld/bloubspace.f90 b/BloubWorld/bloubspace.f90
index 135c1a6..78d8b3c 100644
--- a/BloubWorld/bloubspace.f90
+++ b/BloubWorld/bloubspace.f90
@@ -72,12 +72,17 @@ module bloubspace
     type(t_bloubs), intent (out)     :: blb
 
     blb%px = 4.33 * (rand() - 0.50)
-    blb%py = 3.33 * (rand() - 0.50)
+    blb%py = 3.70 * (rand() - 0.50)
     blb%pz = 4.51 * (rand() - 0.50)
 
     blb%vx = (rand()) / 2.000
-    blb%vy = (rand()) / 2.900
+    if (blb%px .LT. 0.0) blb%vx = -blb%vx
+
+    blb%vy = (rand()) / 3.200
+    if (blb%py .LT. 0.0) blb%vy = -blb%vx
+
     blb%vz = (rand()) / 2.000
+    if (blb%pz .LT. 0.0) blb%vz = -blb%vz
 
     blb%state  = 0
     blb%alive  = .TRUE.