Samsung Galaxy S7 weird stripes and crash

[Spawn 1]

Hello everybody,today I'm here because my S7 caused me problems for some time now.When I'm surfing in the Internet or am using social apps,my S7 randomly decided to give me a display with weird stripes.Its usually just one stripe,but sometimes more.The color is always green,red or rainbow like.And when that happens the phone always freezes and sometimes crashes.I'd like to know what exactly this is,and how to fix it.I've had the phone for around 3 months now so if necessary I could get a replacement.I also tried factory reset and cache wipe,but both methods were unable to fix the problem

 

[lerdsuwa]

You should bring it to service center. Better take a photo (with another phone) of the screen when this happens to show them.