Write code for all mcs?

1

Hi, i wish to generate salt particles but when I click the start button i want all of these particles moving across the screen.However, I can only manage one to move across the stage
:S
Thank you

hereis the code for the start button

on (release) {

var count:Number;

function generateSalt (){
var salt_no:Number = SaltStepper.value;
for (var count:Number = 0; count<salt_no; count++){
Position_y = Math.random () * 125 + 5
_root.attachMovie(“Salt_mc”, “Salt”, this.getNextHighestDepth(), {_x: 800, _y: Position_y});
_root.Salt.duplicateMovieClip (“Salt” + count, count);

}

}
generateSalt();
}