diff --git a/.gitignore b/.gitignore
index 30719e2..9d515a0 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
+.idea/
 # ---> macOS
 # General
 .DS_Store
diff --git a/HelloWorld.py b/HelloWorld.py
new file mode 100755
index 0000000..b30417a
--- /dev/null
+++ b/HelloWorld.py
@@ -0,0 +1,4 @@
+#!/usr/bin/env python3
+
+if __name__ == "__main__":
+    print("hello world.")