diff --git a/leap/leap.py b/leap/leap.py
index 50fd034..ca9a65a 100644
--- a/leap/leap.py
+++ b/leap/leap.py
@@ -1,2 +1,23 @@
 def leap_year(year):
-    pass
+    if year % 400 == 0:
+        return True
+    elif year % 100 == 0:
+        return False
+    elif year % 4 == 0:
+        return True
+    else:
+        return False
+
+print(leap_year(1999))
+    #pass
+# ctrl-j 
+# cd leap
+# python3 leap.py
+# python3 -i leap.py
+# 
+
+
+
+## My Exercise
+# exit() or quit()
+# q to return
\ No newline at end of file