A question about the Craps game?

Question

Let's say I put a don't pass bet of 100 at the begining. An 8 comes out, and we move on. After the 8, I place another 100 on the COME BET. Now, if a 7 comes out, I will win 100 on my don't pass line bet, and 100 on my come bet, right?

My other question is that, let's say a 4 comes out. Can I retreat my come bet now?

THANKS

Answer 1

THE COME BET IS CONSIDERED A CONTRACT BET BY THE CASINO. AFTER MAKING THIS TYPE OF BET,YOU MUST LEAVE IT ON THE TABLE UNTIL A DECISION IS ARRIVED AT.

Answer 2

If you could retract the come bet after the number came out, then everyone would retract all the time.  

Answer 3

your right on the first one, but you cant remove your come bet on the 4, until another 4 rolls up.