diff --git a/.gitignore b/.gitignore
index eecf2f0..6f32274 100644
--- a/.gitignore
+++ b/.gitignore
@@ -7,7 +7,6 @@ __pycache__/
 *.log
 *.backup
 tf_env/
-*.png
 *.mp4
 *.mkv
 
diff --git a/colab_instruction.png b/colab_instruction.png
new file mode 100644
index 0000000..be676ef
Binary files /dev/null and b/colab_instruction.png differ
diff --git a/colab_tcp_tunnel.png b/colab_tcp_tunnel.png
new file mode 100644
index 0000000..45e2af6
Binary files /dev/null and b/colab_tcp_tunnel.png differ