Particle Popcorn cannon

I got this AS3 code about a year ago off a website and was able to modify it enough to use it for a banner showing popping pocorn. Now I'm looking to change it so instead of balls I can use instances of a movie clip (a piece of popcorn). I've been trying to replace the drawn ball with a MC but have had zero luck so far. I'm still really new to AS3 so any help would be greatly appreciated. Thanks!

Actionscript Code:

/* 
Define the gravity.
This determines how fast the balls are pulled down.
*/
var gravity:Number = 0.2;
 
//Create 128 balls in the for-loop (change this to whatever you want)
for (var i = 0; i < 44; i++) {
 
    //Create a ball
    var ball:MovieClip = new MovieClip();
 
    //Call the function that draws a circle on the ball movie clip
    drawGraphics(ball);
 
    //Initial position of the ball
    ball.x = 55;
    ball.y = 50;
 
    //Define a random x and y speed for the ball
    ball.speedX = Math.random() * 2 - 1;
    ball.speedY = Math.random() * -4 - 2;
 
    //Add the ball to the stage
    addChildAt(ball, 2)
    
 
    //ENTER_FRAME function is responsible for animating the ball
    ball.addEventListener(Event.ENTER_FRAME,moveBall);
}
 
/* 
This function is responsible for drawing a circle 
on a movie clip given as parameter
*/
function drawGraphics (mc:MovieClip):void {
 
    //Give a random color for the circle
    mc.graphics.beginFill (0xffff99);
 
    //Draw the cirlce
    mc.graphics.drawCircle (0, 0, 1.5);
 
    //End the filling
    mc.graphics.endFill ();
}
//This function is responsible for animation a ball
function moveBall (e:Event):void {
 
    //Let's assign the ball to a local variable
    var ball:MovieClip = (MovieClip)(e.target);
 
    //Apply gravity tot the y speed
    ball.speedY += gravity;
 
    //Update the ball's postion
    ball.x += ball.speedX;
    ball.y += ball.speedY;
 
    //Chech if the ball has gone under the stage
    if (ball.y > 109) {
 
        /* 
        Calculate the mouse height.
        We use the mouse height to give the ball a new random y speed
        */
        var mouseHeight:Number = stage.stageHeight - 200;
 
        //Calculate the new y speed
        var newSpeedY = Math.random() * (-75 * 0.05);
 
        //Move the ball to the initial position
        ball.x = 55 ;
        ball.y = 50 ;
 
        //Assign the new calculated random speeds for the ball
        ball.speedX = Math.random() * 4 - 1;
        ball.speedY = newSpeedY;
    }
}