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+# HW 4. Functions 2
+> *This is the repo for the fourth homework of the BI Python 2023 course*
+
+### Title
+
+### Overview 
+
+### Usage
+
+### Options
+
+### Examples
+
+### Troubleshooting
+
+### Contacts
+
+Feel free to report any bugs and problems encountered.
+Email: nikita.sapozhnikov1@gmail.com
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diff --git a/HW4_Sapozhnikov/prototool.py b/HW4_Sapozhnikov/prototool.py
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+def main():
+    """
+    an entry point to the tool
+
+    This tool provides the following functionality:
+    - local alignment of two sequences
+    - ...
+
+    To get started choose one of the possible programms to run:
+    1. Local alignment
+    Enter two protein sequences in 1- letter encoding. The code will return alignment scores and 
+    sequences aligned on each other. 
+    2. ...
+
+    """
+    pass
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