# Blank White Screen on Pavlovia after uploading experiment from PsychoPy

**URL:** <https://discourse.psychopy.org/t/blank-white-screen-on-pavlovia-after-uploading-experiment-from-psychopy/30082>\
**Category:** Online experiments\
**Tags:** pavlovia\
**Created:** [July 19, 2022, 10:39pm UTC](https://discourse.psychopy.org/t/blank-white-screen-on-pavlovia-after-uploading-experiment-from-psychopy/30082 "2022-07-19T22:39:38Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Care](https://avatars.discourse-cdn.com/v4/letter/c/b3f665/32.png) [@Care](https://discourse.psychopy.org/u/Care)\
**Post date:** [July 19, 2022, 10:39pm UTC](https://discourse.psychopy.org/t/blank-white-screen-on-pavlovia-after-uploading-experiment-from-psychopy/30082/1 "2022-07-19T22:39:38Z")

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URL of experiment:

Description of the problem:  
For some reason, when I run my experiment on Pavlovia, it opens onto a white screen and does not change to the black background I have on the program. Therefore, when I run it on PsychoPy it works, and has a black background and you can see the white text instructions. However, this is not visible when you run the experiment on Pavlovia. I left the window open for 10 minutes to see if it would change and it still has not.

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**Author:** ![ajus](https://avatars.discourse-cdn.com/v4/letter/a/dc4da7/32.png) [@ajus](https://discourse.psychopy.org/u/ajus)\
**Post date:** [July 20, 2022, 7:28am UTC](https://discourse.psychopy.org/t/blank-white-screen-on-pavlovia-after-uploading-experiment-from-psychopy/30082/2 "2022-07-20T07:28:54Z")

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Do you do anything fancy with the background color like changing it during the experiment? Or is it just a fixed value throughout the experiment?

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**Author:** ![Care](https://avatars.discourse-cdn.com/v4/letter/c/b3f665/32.png) [@Care](https://discourse.psychopy.org/u/Care)\
**Post date:** [July 20, 2022, 2:32pm UTC](https://discourse.psychopy.org/t/blank-white-screen-on-pavlovia-after-uploading-experiment-from-psychopy/30082/3 "2022-07-20T14:32:44Z")

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I just change it to blue at one point, but for the rest of the time it is black.

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**Author:** ![wakecarter](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.psychopy.org/wakecarter/32/5753_2.png) [@wakecarter](https://discourse.psychopy.org/u/wakecarter)\
**Post date:** [July 21, 2022, 5:50am UTC](https://discourse.psychopy.org/t/blank-white-screen-on-pavlovia-after-uploading-experiment-from-psychopy/30082/4 "2022-07-21T05:50:18Z")

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Please could you show your background colour as set in Experiment Settings/Display and also how you change it? I use a 2 x 2 norm rectangle as the first component if I want a routine to have a custom coloured background.