diff --git a/README.MD b/README.MD
index 8b13789..3d560dd 100644
--- a/README.MD
+++ b/README.MD
@@ -1 +1,21 @@
+# How to run
 
+## Activate python environment
+
+Create a python environment with
+```zsh
+python -m venv <environment_name>
+```
+
+and run it with:
+
+Windows: `<environment_name>\Scripts\activate`
+
+macOS/Linux: 
+`source <environment_name>/bin/activate`
+
+## Run script
+
+```zsh
+python lasConverter.py <input_directory> <output_directory>
+```