add javadoc

Author: mikebarkmin

src/org/openpatch/scratch/Window.java

@@ -207,6 +207,12 @@ public void setStage(Stage stage) {
     Applet.getInstance().setStage(stage);
   }
 
+  /**
+   * Transitions to a new stage with a specified duration.
+   *
+   * @param stage    the new stage to transition to
+   * @param duration the duration of the transition in milliseconds
+   */
   public void transitionToStage(Stage stage, int duration) {
     Applet.getInstance().transitionToStage(stage, duration);
   }