Screen messing up on iPhone 6?

So the entire thing went into pixely colors and then white when I opened up safari and then I closed it out and now all the corners/sides of the screen are changing brightness. I hard reset it and still nothing, the brightness is still going. I tried to screen record to send it to my family but now I can't stop recording.

This could be a lot off different things. There will probably not be an easy fix to this problem. I would power the phone off for awhile to see if over heating might be the cause. This is a long shot since i phones normally power themselves off if they are having any over heating problems. If that does not work the only thing that I could suggest is to take the phone to a repair center. It could be a simple screen replacement, it could be some other internal component that has failed. Given the age of the phone replacing it entirely might be your best option

You're going to have to open the back of your phone and saulder the cord connecting to the center of your screen onto one of the corners, then you rub a strong magnet in clockwise rotation around the back of the screen for about 30 seconds.

Hope that helps!