Update README.md

Instructions for jumping into a specific koan

README.md

@@ -38,6 +38,14 @@ If you want the autorunner to show you your previous results, run it with `--no-
 $ mix meditate --no-clear-screen
 ```
 
+If you want to jump to a specific lesson, run it with `--koan=<koan name>`
+```sh
+$ mix meditate --koan=PatternMatching 
+```
+
+Any typos on the koan name will show the complete list of koans, where you can pick any.
+
+
 ### Contributing
 
 We welcome contributions! If something does not make sense along the way or you feel