diff --git a/mustergenerator.py b/mustergenerator.py
index 0f4b954..4588a28 100644
--- a/mustergenerator.py
+++ b/mustergenerator.py
@@ -47,6 +47,7 @@ class Circle:
     def radius(self, val):
         assert radius >= 0, "radius can not be negative"
         self.__radius = val
+
     @property
     def distance(self):
         return self.__distance