diff --git a/main.cpp b/main.cpp
index a64e3b4..9d7b665 100755
--- a/main.cpp
+++ b/main.cpp
@@ -11,6 +11,7 @@ void mainL01() {
     Point p(10,10,'X');
     p.print();
 
+    Graphics::get().refreshScreen();
     std::this_thread::sleep_for(std::chrono::seconds(10));
 
     Graphics::get().finalize();