Minecraft Crashing

Whenever I Open And Play Minecraft, it crashes, and it's very annoying.

What I expected to happen was...:
To Play The game without it crashing

What actually happened was...:
My minecraft keeps crashing when I go to play Minecraft.

Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
2. ...I don't know
Need Help
3. ...