diff --git a/fib.py b/fib.py
index 421cfab..48b9234 100644
--- a/fib.py
+++ b/fib.py
@@ -1,15 +1,13 @@
 
-"""
-Fibonacci number generator
-When given a position, the function returns the fibonacci at that position in the sequence.
-The zeroth number in the fibonacci sequence is 0. The first number is 1
-Negative numbers should return None
-"""
+
 def fibonacci(position):
-  if(position == 1 or position == 2):
-    return 1
+ if position < 0: return None
+ elif position == 0: return 0
+ elif position == 1: return 1
+ else:
   return fibonacci(position - 1) + fibonacci(position - 2)
 
 
 
 
+