background flickering

Hello ayush2005,

We understand your iPhone screen is flickering, and we'd like to help.

To help us get a better understanding of the issue, we’d like to ask a few questions.

1. Does this occur when recording videos in the Apple Camera app, or does it happen with any app you record videos in? Record videos with your iPhone camera - Apple Support
2. Does the flickering appear when playing a video you recorded?
3. Which iOS version is your iPhone running? Find the software version on your iPhone, iPad, or iPod - Apple Support

Also, check out the troubleshooting steps in the link below since they can help you with your display.

If the screen isn't working on your iPhone or iPad

1) Restart your iPhone or iPad.

2) Make sure your screen is clean and free of any debris or water.

3) Disconnect any Lightning or USB-C accessories. If your screen works after removing an accessory, try using a different socket, cable or charger.

4) Remove any cases or screen protectors.

We recommend the steps above because they will show you what to do if the screen isn't working as expected on your iPhone.

Please let us know the outcome after giving the above steps a try.

Thanks for using the Apple Support Communities.

Cheers!