diff --git a/Hybrid_Optica_run/readme.txt b/Hybrid_Optica_run/readme.txt
new file mode 100644
index 0000000..a1fbb7b
--- /dev/null
+++ b/Hybrid_Optica_run/readme.txt
@@ -0,0 +1,3 @@
+"""
+Documents for Hybrid Brillouin Laser project
+"""
\ No newline at end of file
diff --git a/IMSBS_run/readme.txt b/IMSBS_run/readme.txt
new file mode 100644
index 0000000..8949686
--- /dev/null
+++ b/IMSBS_run/readme.txt
@@ -0,0 +1,3 @@
+"""
+Documents for IM SBS project
+"""
\ No newline at end of file
diff --git a/Directional_Coupler.py b/class/Directional_Coupler.py
similarity index 100%
rename from Directional_Coupler.py
rename to class/Directional_Coupler.py
diff --git a/euler_rounding_algorithm.py b/class/euler_rounding_algorithm.py
similarity index 100%
rename from euler_rounding_algorithm.py
rename to class/euler_rounding_algorithm.py