diff --git a/.gitignore b/.gitignore
index 76e0c92..d3257f9 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,5 @@
 *.py[cod]
+*~
 
 # C extensions
 *.so
diff --git a/README.md b/README.md
index 5dc4e11..cde21bf 100644
--- a/README.md
+++ b/README.md
@@ -49,7 +49,7 @@ PyKeyboardEvent, so here's an example of subclassing PyMouseEvent:
     from pymouse import PyMouseEvent
 
     def fibo():
-        a = 1
+        a = 0
         yield a
         b = 1
         yield b
diff --git a/examples/clickonacci.py b/examples/clickonacci.py
new file mode 100644
index 0000000..1f07dbb
--- /dev/null
+++ b/examples/clickonacci.py
@@ -0,0 +1,26 @@
+from pymouse import PyMouseEvent
+
+def fibo():
+    a = 0
+    yield a
+    b = 1
+    yield b
+    while True:
+        a, b = b, a+b
+        yield b
+
+class Clickonacci(PyMouseEvent):
+    def __init__(self):
+        PyMouseEvent.__init__(self)
+        self.fibo = fibo()
+
+    def click(self, x, y, button, press):
+        '''Print Fibonacci numbers when the left click is pressed.'''
+        if button == 1:
+            if press:
+                print(self.fibo.next())
+        else:  # Exit if any other mouse button used
+            self.stop()
+
+C = Clickonacci()
+C.run()
\ No newline at end of file