--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/screenflip.cs	Mon Jan 23 23:25:44 2023 -0500
@@ -0,0 +1,33 @@
+#define VER_GEQ_14 // remove this for vegas 13
+#if VER_GEQ_14
+using ScriptPortal.Vegas;
+#else
+using Sony.Vegas;
+#endif
+using System.Windows.Forms;
+
+public class EntryPoint {
+    public void FromVegas(Vegas vegas) {
+        foreach (Track track in vegas.Project.Tracks) {
+            int count = 1;
+            foreach (TrackEvent trackEvent in track.Events) {
+                if (trackEvent.Selected && trackEvent.IsVideo()) {
+                    VideoEvent video = trackEvent as VideoEvent;
+                    foreach (VideoMotionKeyframe keyframe in video.VideoMotion.Keyframes) {
+                        VideoMotionVertex tl = keyframe.TopLeft, 
+                                          tr = keyframe.TopRight, 
+                                          bl = keyframe.BottomLeft, 
+                                          br = keyframe.BottomRight;
+                        VideoMotionBounds bh = new VideoMotionBounds(tl, tr, br, bl);
+                        if (count == 2)
+                            bh = new VideoMotionBounds(tr, tl, bl, br);
+                        keyframe.Bounds = bh;
+                    }
+                    if (count == 2)
+                        count = 0;
+                    count += 1;
+                }
+            }
+        }
+    }
+}