Bubble quiestion

hey all ive got an quistion…

i am trying to make some bubbles in flash but im stuck…

i have:

onEnterFrame=function() {
bubbels() ;
}

function bubbels() {
bubbels_voor._x = 200 + Math.sin(angle) * 20
angle += 0.1;
bubbels_voor._y -= 1;
bubbels_voor._x =-10
}

allright this works and it 1 bubble but i need like 10 bubbles and also it need to be filled by all the time.
also the bubbles random_x positioning has to be trough the whole Stage.width

can someone help me?