diff --git a/watch.rb b/watch.rb
new file mode 100644
index 00000000..935c4ca9
--- /dev/null
+++ b/watch.rb
@@ -0,0 +1,12 @@
+#watch file
+
+watch('lib/(.*)\.js') { |md|
+  system('echo "lib changed"')
+}
+
+watch('test/(.*)\.js') { |md|
+  system("node #{md}")
+  puts ""
+  puts("waiting...")
+  puts ""
+}