Wanted to log in to just check in on towns/everything for a bit. Launched 1.10 and it worked fine, had to relaunch with 1.2 (I believe, w/e the newest is) and got optifine for it. I tried launching it and after it loaded. the launching screen disappeared and then reappeared half a second later all white except for the bottom, allowing me to attempt to launch it. It resulted in the same issue. Had this issue before (over a year ago) and forget how to solve it. If anyone is familiar with this it would be helpful, thank you.

 

It seems to have fixed itself after I reinstalled minecraft and optifine, thank you