Good Riddles

Question: If all of your surrounding is X, you can't Y. X n Y have the same letters. Name X n Y.

Question: How can you make 4 triangles with 6 equal sticks?

Question: What can fall but never stay, something colorless with peoples dislikes?

Question: I am there !!! but I was!!!

Question: I'm in every room, yet outside. I move at different paces, but you never see me moving. Where ever I am its crowded, but when your there you don't see or feel anyone. If you try to hit me you always miss, yet you always feel me. You need me to live, but I cause disasters. What am I?