code:


import Classes.Lights;

var colors:Array = [0xC58E55, 0xCC9933, 0x704D08, 0xDBBA77, 0xFFFFFF, 0x231708];

var light:Lights = new Lights();

light.init(600, 600, 170, 60, colors, 0.2, 2, 5, "up", 3);

addChildAt(light, 1)

code:


package Classes

{

	/* Import required classes */



	import flash.display.MovieClip;

	import flash.filters.BitmapFilter;

	import flash.filters.BlurFilter;

	import flash.events.Event;



	//We need to extend the class so we can use the addChild() method. 

 

  public class Lights extends MovieClip

{

		/* Vars */



private var lightsNumber:int; //The number of Lights on Stage

private var xSpeed:int; //The horizontal speed the Lights have

private var ySpeed:int; //Vertical Speed

private var lightsDir:String; //Direction the Lights are going, this can be Up, Down, Left or Right

private var areaW:int; //The width of the area where the effect will take place

private var areaH:int; //Height

private var lights:Array = new Array(); //This array will store all the Lights MovieClips so we can use them outside the For where we are going to create them.



		/* Main function */



		public function init(areaWidth:int, areaHeight:int, numberOfLights:int, lightSize:int, lightColors:Array, minimumScale:Number, hSpeed:int, vSpeed:int, dir:String, quality:int):void

		{



			/* Set variables */



			areaW = areaWidth;

			areaH = areaHeight;

			lightsNumber = numberOfLights;

			lightsDir = dir;



			/* Use a for to create the parameter-specified number of lights*/



			for (var i:int = 0; i < numberOfLights; i++)

			{

				/* Create the specified number of lights */



				var light:MovieClip = new MovieClip();



				/* Set random speed to x and y based on the params*/



				xSpeed = Math.floor((Math.random() * (hSpeed - -hSpeed + 1)) + -hSpeed);

				ySpeed = Math.round((Math.random() * vSpeed) + 0.5);



				light.xSpeed = xSpeed;

				light.ySpeed = ySpeed;

				

				/* Create lights */



				light.graphics.beginFill(lightColors[Math.floor(Math.random() * lightColors.length)]);

				light.graphics.drawCircle(0, 0, lightSize / 2);

				light.graphics.endFill();



				/* Set a position based on the params specified */



				light.x = Math.floor(Math.random() * areaWidth);

				light.y = Math.floor(Math.random() * areaHeight);



				/* Add blur, we declare the var here to get a new blur w/every light */



				var b:int = Math.floor(Math.random() * 10) + 5; //Calculates a random Blur between 0-9 and adds 5 to the result.

 

   var blur:BitmapFilter = new BlurFilter(b,b,quality); //The BlurFilter object.

 

   var filterArray:Array = new Array(blur); //To apply the filter we need an array of filters.

 

   light.filters = filterArray; //Sets the filters array to the Light



				/* Change alpha */



				light.alpha = Math.random() * 0.6 + 0.1;



				/* Scale */



				light.scaleX = Math.round(((Math.random() * (1 - minimumScale)) + minimumScale) * 100) / 100;

				light.scaleY = light.scaleX;



				/* Add the lights */



				addChild(light);



				/* Store lights in an array to use it later */



				lights.push(light);



				/* Check for lights direction */



				checkDirection();

			}

		}



		/* Check direction */



		private function checkDirection():void

		{

			for (var i:int = 0; i < lights.length; i++)

			{

				switch ( lightsDir )

				{

					case "up" :



						lights[i].addEventListener(Event.ENTER_FRAME, moveUp);



						break;

					case "down" :



						lights[i].addEventListener(Event.ENTER_FRAME, moveDown);



						break;

					case "right" :



						lights[i].addEventListener(Event.ENTER_FRAME, moveRight);



						break;

					case "left" :



						lights[i].addEventListener(Event.ENTER_FRAME, moveLeft);



						break;

					default :



						trace("Something weird just happened!");

				}

			}

		}



		/* Move Up function */



		private function moveUp(e:Event):void

		{

			e.target.x += e.target.xSpeed;

			e.target.y-=e.target.ySpeed;



			/* Reset light position, Y first, then X  */



			if (e.target.y + (e.target.height / 2) < 0)

			{

				e.target.y = areaH + (e.target.height / 2);

				e.target.x=Math.floor(Math.random()*areaW);

			}



			if ((e.target.x + e.target.width / 2) < 0 || (e.target.x - e.target.width / 2) > areaW)

			{

				e.target.y = areaH + (e.target.height / 2);

				e.target.x=Math.floor(Math.random()*areaW);

			}

		}



		/* Move Down function */



		private function moveDown(e:Event):void

		{

			e.target.x+=e.target.xSpeed;

			e.target.y+=e.target.ySpeed;



			/* Reset light position, Y first, then X */



			if (e.target.y - (e.target.height / 2) > areaH)

			{

				e.target.y = 0 - (e.target.height / 2);

				e.target.x=Math.floor(Math.random()*areaW);

			}



			if ((e.target.x + e.target.width / 2) < 0 || (e.target.x - e.target.width / 2) > areaW)

			{

				e.target.y = areaH + (e.target.height / 2);

				e.target.x=Math.floor(Math.random()*areaW);

			}

		}



		/* Move Right function */



		private function moveRight(e:Event):void

		{

			e.target.x+=e.target.ySpeed;

			e.target.y+=e.target.xSpeed;



			/* Reset light position, Y first, then X */



			if (e.target.y - (e.target.height / 2) > areaH || e.target.y + (e.target.height / 2) < 0)

			{

				e.target.x = 0 - (e.target.height / 2);

				e.target.y = Math.floor(Math.random()*areaH);

			}



			if ((e.target.x - e.target.width / 2) > areaW)

			{

				e.target.x = 0 - (e.target.height / 2);

				e.target.y = Math.floor(Math.random()*areaW);

			}

		}



		/* Move Left function */



		private function moveLeft(e:Event):void

		{

			e.target.x-=e.target.ySpeed;

			e.target.y-=e.target.xSpeed;



			/* Reset light position, Y first, then X */



			if (e.target.y - (e.target.height / 2) > areaH || e.target.y + (e.target.height / 2) < 0)

			{

				e.target.x = areaW + (e.target.width / 2);

				e.target.y=Math.floor(Math.random()*areaH);

			}



			if ((e.target.x + e.target.width / 2) < 0)

			{

				e.target.x = areaW + (e.target.width / 2);

				e.target.y=Math.floor(Math.random()*areaW);

			}

		}

	}

}

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