Hi novuyo_zw,
We see that your MacBook Pro is currently showing a flicker on the display while using it. Let's see how we can help out.
First, test in safe mode to see if it persists: How to use safe mode on your Mac. It’s a way to start up your Mac so it performs certain checks, repairs, emptying of system cache, and prevents some software from automatically loading. This will let us know whether issues you’re experiencing are caused by software that loads as your Mac starts up. With this being said, after testing in safe mode, restart and log in as normal to see if that helps resolve the issue.
We also want to see if it's happening while in recovery mode: Mac startup key combinations. You can just use Command (⌘)-R to boot up in recovery and you don't have to take any other steps in there other than observing to see if the flickering stops or continues. You can then restart your Mac as normal to get out of recovery.
Once we hear back from you with results after performing the above steps, we'll have a better idea on next steps to continue assisting.
Take care!