diff --git a/drone_test/__main__.py b/drone_test/__main__.py
new file mode 100644
index 0000000..11c65f4
--- /dev/null
+++ b/drone_test/__main__.py
@@ -0,0 +1,9 @@
+"""Python module to test drone builds"""
+
+import sys
+
+from _circle_area import circle_area
+
+if __name__ == '__main__':
+    for arg in sys.argv[1:]:
+        print(circle_area(float(arg)))
diff --git a/drone_test/__init__.py b/drone_test/_circle_area.py
similarity index 65%
rename from drone_test/__init__.py
rename to drone_test/_circle_area.py
index a35fa4e..07eb1d1 100644
--- a/drone_test/__init__.py
+++ b/drone_test/_circle_area.py
@@ -1,5 +1,3 @@
-"""Python module to test drone builds"""
-
 import math
 
 def circle_area(radius: float):
@@ -9,7 +7,7 @@ def circle_area(radius: float):
     :raises ValueError: radius is negative
     :return: area of the circle
     """
-    if radius < 0:
-        raise ValueError("Circle can't have negative radius")
+    #if radius < 0:
+        #raise ValueError("Circle can't have negative radius")
 
     return math.pi * radius ** 2
diff --git a/tests/test_circle_area.py b/tests/test_circle_area.py
index d0f8d56..432549a 100644
--- a/tests/test_circle_area.py
+++ b/tests/test_circle_area.py
@@ -1,7 +1,7 @@
 from unittest import TestCase
 import math
 
-from drone_test import circle_area
+from drone_test._circle_area import circle_area
 
 class CircleAreaTest(TestCase):
     def test_area_1(self):