Avoid CircleGraphic stimuli being overlapped

Hi,

In a certain scene, I present a picture as the background with create_scene function. Meanwhile, I will briefly present a circle using CircleGraphic in this scene. However, I found this circle will be masked by the picture which has the screen size. How can I avoid this?

Thanks.

You have asked about this already.
https://monkeylogic.nimh.nih.gov/board/read.php?3,1685