diff --git a/darts/darts.py b/darts/darts.py
index 4ba1b3b..e35ad8c 100644
--- a/darts/darts.py
+++ b/darts/darts.py
@@ -1,2 +1,15 @@
+OUTER_RADIUS = 10
+MIDDLE_RADIUS = 5
+INNER_RADIUS = 1
+
 def score(x, y):
-    pass
+    distance_squared = x**2 + y**2
+
+    if distance_squared <= INNER_RADIUS**2:
+        return 10
+    elif distance_squared <= MIDDLE_RADIUS**2:
+        return 5
+    elif distance_squared <= OUTER_RADIUS**2:
+        return 1
+    else:
+        return 0