# Running a continuous video in the background, with changing rating scale in the foreground.

**URL:** <https://psychtoolbox.discourse.group/t/running-a-continuous-video-in-the-background-with-changing-rating-scale-in-the-foreground/34>\
**Category:** Uncategorized\
**Created:** [March 12, 2019, 8:47pm UTC](https://psychtoolbox.discourse.group/t/running-a-continuous-video-in-the-background-with-changing-rating-scale-in-the-foreground/34 "2019-03-12T20:47:29Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![sbhutani](https://avatars.discourse-cdn.com/v4/letter/s/e9c0ed/32.png) [@sbhutani](https://psychtoolbox.discourse.group/u/sbhutani)\
**Post date:** [March 12, 2019, 8:47pm UTC](https://psychtoolbox.discourse.group/t/running-a-continuous-video-in-the-background-with-changing-rating-scale-in-the-foreground/34/1 "2019-03-12T20:47:29Z")

</div>

Hi,&nbsp;

  

I am designing a task where I want to present a continuous video in the background with a rating scale superimposed in the foreground. I do not want the video to refresh, but the rating scale will change at each trial (every 8-10 seconds), and should appear overlayed on the video. The rating scale will appear after the participants smell an odor triggered by a Matlab controlled device.I have tried doing this with Matlab and Cogent graphics toolbox, with no success.

Is it at all possible to achieve video + rating scale presented together with Psychtoolbox? I have never used this toolbox before, so I am not sure where to get started. Any feedback or piece of code to get started will be extremely helpful.&nbsp;

  

Thanks much!!!