I love playing minecraft survival, but sadly I can't anymore at least for more than five minutes. After loading a lot of chunks at one time, my minecraft crashes, but brings up a strange pop up. I also have dropped twenty frames per second. Also there are these weird lights and glitches. I have two screenshots.
Screenshot of my minecraft freezing and bringing up the pop up: http://imgur.com/5Ch9oLR
Screenshot of the weird light glitch: http://imgur.com/Xz5Fllq
It would be very awesome if anyone could help me, I would be very grateful! Thank you!