PARTICLE EFFECT

Step 1

Create a new flash document, press Ctrl+J on the keyboard (Document Properties) and set Width to 300 and Height to 200px. Frame rate set to 65fps.

Step 2

Take the Oval Tool (O), Stroke Color must be switched off, under Fill Color choose any color and draw a "circle" like it is shown on the picture below.

Step 3

Open the Color Mixer Panel (Shift+F9), and set the options from the picture below.

Step 4

Select the "Particle" and Press F8 on the keyboard to convert it into a Movie Clip.

Step 5

Double click on a new made Movie Clip ("Particle) to go in its inside.

Step 6

While your "Particle" is still selected press again F8 on the keyboard to convert it into a Graphic.

Step 7

Click on the first frame, open the Action Script Panel (F9), and paste this script:

xMin = 0;
xMax = 300;
yMin = 0;
yMax = 200;
minSize = 10;
maxSize = 50;
easeFactor = 10;

randomX = Math.random () * ( xMax - xMin ) + xMin;
randomY = Math.random () * ( yMax - yMin ) + yMin;
randomSize = Math.random () * ( maxSize - minSize ) + minSize;

Step 8

Click on the second frame and press F5.

Step 9

Click on the third frame and press F6. After that open the Action Script Panel (F9), and paste this script:

distance = Math.sqrt(Math.pow(this._x-randomX, 2)+Math.pow(this._y-randomY, 2));

if (Math.abs(this._width-maxSize)>1) {
this._width += (randomSize-this._width)/2;
this._height += (randomSize-this._height)/2;
}

if (distance>1) {
this._x += (randomX-this._x)/easeFactor;
this._y += (randomY-this._y)/easeFactor;
gotoAndPlay(2);
} else {
gotoAndPlay(1);
}

We're done!

Test your Movie (Ctrl+Enter).