package {
    import flash.display.*;
    import flash.events.*;
    import flash.geom.*;
    import flash.filters.*;
    
    [SWF(backgroundColor='#ffffff', frameRate='60')]
    public class main extends Sprite {
        private const FB:Number = 0.98;
        private var smokeField:Sprite = new Sprite();
        private var screen:BitmapData = new BitmapData(465, 465, false, 0);
        private var feedback:ColorTransform = new ColorTransform(FB, FB, FB, 1);
        private var blur:BlurFilter = new BlurFilter(2, 2);
        private var text1:SmokyText = new SmokyText(232, 160, 0, "Smoky Light", 70, 0x404060, false);
        private var text2:SmokyText = new SmokyText(232, 320, 0, "click to disappear", 30, 0x404060, false);
        private var text3:SmokyText = new SmokyText(232, 350, 0, "and type to appear", 18, 0x404060, false);
        
        function main() {
            SmokyText.forceField.perlinNoise(465, 465, 4, Math.random()*10000, true, true);
            smokeField.addChild(text1);
            smokeField.addChild(text2);
            smokeField.addChild(text3);
            addEventListener("enterFrame", _onEnterFrame);
            stage.addEventListener("keyDown", _onKeyDown);
            stage.addEventListener("click", function(e:Event) : void { text3.isPlaying = text2.isPlaying = text1.isPlaying = true; });
            addChild(new Bitmap(screen));
        }
        
        private function _onKeyDown(e:KeyboardEvent) : void {
            if (smokeField.numChildren < 5) {
                smokeField.addChild(new SmokyText(r(200,232), r(200,232), r(180,-90), String.fromCharCode(e.keyCode), 70, 0x404060));
            }
        }
        
        private function _onEnterFrame(e:Event) : void {
            screen.colorTransform(screen.rect, feedback);
            screen.applyFilter(screen, screen.rect, screen.rect.topLeft, blur);
            screen.draw(smokeField, null, null, "add");
        }
        
        private function r(range:Number, offset:Number) : Number {
            return (Math.random()-Math.random()) * range + offset;
        }
    }
}

import flash.display.*;
import flash.text.*;
import flash.events.*;
import flash.geom.*;
import flash.filters.*;

class SmokyText extends Shape {
    static public const FORCE:Number = 0.5;
    static public const ATTEN:Number = 0.99;
    static public var forceField:BitmapData = new BitmapData(465, 465, false, 0);
    static public var blur:BlurFilter = new BlurFilter(1, 2);
    public var source:BitmapData;
    public var vel:Vector.<Number> = new Vector.<Number>();
    public var vtx:Vector.<Number> = new Vector.<Number>();
    public var idx:Vector.<int>    = new Vector.<int>();
    public var uvt:Vector.<Number> = new Vector.<Number>();
    public var isPlaying:Boolean = true;

Smoky text forked from: adobe challenge 1