diff --git a/README.md b/README.md
index b7457af..911e72d 100644
--- a/README.md
+++ b/README.md
@@ -21,4 +21,16 @@ The repl has the following syntax (It's work in progress, new capabilities will
 * property lookup
   * a.x+1
   > > 13
-  
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+  
+
+**To run locally**
+* make sure you have node/npm
+* cmdline: npm run start
+* enter the following:
+  ```
+  a=vector(0,0,0.5,0.5)
+  b=vector(0,0,-1,1)
+  c="a+b"
+  ```
+* and press enter
+* or type help()
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