dealt, the player under the gun has three options: in this case, a call will match the size of the big blind, which is considered a bet in poker.
once the player under the gun has taken their turn, the next player to the left can either raise, call or fold.
this procedure continues around the table to the big blind, who has the same three options. at this point, if there are two or more players left in the hand, and there is still a raise that has yet to be called, the action continues around the table until the last player left to act closes the betting round by calling 