Somebody,,can help me? I wanna make a game as3 using this script.Please

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// create a scene movieclip to contain all 3D elements
// and center it on the screen.
this.createEmptyMovieClip(“theScene”, 1);
theScene._x = 150;
theScene._y = 150;
theScene.depth = 1; // variable to control depth placement

// now we’re going to create an array to keep track of all the
// objects in the scene. That way, to position all the objects
// you just need to loop through this array.
objectsInScene = new Array();

// now make a camera object to serve as the users view or camera
// position within the cockpit of the car
cameraView = new Object();
cameraView.x = 0;
cameraView.y = -100;
cameraView.z = 0;
// set a variable for user (camera) velocity
cameraView.velocity = 0;

// focal length to determine perspective scaling
focalLength = 300;

// the objects in this scene (other than the cameraView) are going to be
// a few cars and some marker clips to define the edge of the road. We’ll
// need to set up functions to handle their actions when the scene is
// being run. They’ll be declared next

// CARS
displayCar = function(){
var x = this.x - cameraView.x;
var y = this.y - cameraView.y;
var z = this.z - cameraView.z;
if (z < 4000){
if (z < 0){
this.z += 3000;
this.x = 200-Math.random()*400;
x = this.x - cameraView.x;
}
this.z += this.velocity;
z = this.z - cameraView.z;
}

var scaleRatio = focalLength/(focalLength + z);
this._x = x * scaleRatio;
this._y = y * scaleRatio;
this._xscale = this._yscale = 100 * scaleRatio;
this.swapDepths(Math.round(-z));

}

// TIRES
displayTire = function(){
var x = this.x - cameraView.x;
var y = this.y - cameraView.y;
var z = this.z - cameraView.z;
if (z < 0){
this.z += 3000;
z = this.z - cameraView.z;
}

var scaleRatio = focalLength/(focalLength + z);
this._x = x * scaleRatio;
this._y = y * scaleRatio;
this._xscale = this._yscale = 100 * scaleRatio;
this.swapDepths(Math.round(-z));

}

// now its time to populate the scene. The edges of the road will be
// determined by a line of markers on each side and there will be, in
// addition to that, 3 other cars on the track. They can be attached
// and added now - the enterFrame actions will striaghten them out when
// the movie is running.
// first we’ll add the 3 cars
for (i=0; i<3; i++){
attachedObj = theScene.attachMovie(“car”, “car”+i, theScene.depth++);
attachedObj.x = 200 - Math.random()400;
attachedObj.y = 0;
attachedObj.z = 500+Math.random()1000;
attachedObj.velocity = 20 + i5;
attachedObj.display = displayCar;
objectsInScene.push(attachedObj);
}
// now we’ll add 20 markers, 10 on each side of the road, to
// define where the road is
for (i=0; i<20; i++){
attachedObj = theScene.attachMovie(“tire”, “tire”+i, theScene.depth++);
if (i < 10){
attachedObj.x = -250;
attachedObj.z = i300;
}else{
attachedObj.x = 250;
attachedObj.z = 150 + (i-10)*300;
}
attachedObj.y = 0;
attachedObj.display = displayTire;
objectsInScene.push(attachedObj);
}

// a function to move back and forth. This will be applied to
// the onEnterFrame of each figure in the scene
drive = function(){

// alter the z value of the camera based on UP and DOWN arrow
// keys, adding that to the camera's velocity.
// in addition, we can add some resistance from just wind and
// friction and things.  So if you let off the arrow keys, you'll
// slowly come to a stop
if (Key.isDown(Key.UP)) cameraView.velocity += 2;
else cameraView.velocity *= .95;
if (Key.isDown(Key.DOWN)) cameraView.velocity -= 2;

// make sure the velocity is within some limits
if (cameraView.velocity &lt; 0) cameraView.velocity = 0;
else if (cameraView.velocity &gt; 80) cameraView.velocity = 80;
// add the velocity to the z 
cameraView.z += cameraView.velocity;

// move the camera left or right based on the
// LEFT and RIGHT arrow keys.  This will be based on velocity
// since the faster you're going, the faster you can turn
if (Key.isDown(Key.LEFT)) cameraView.x -= cameraView.velocity/5;
if (Key.isDown(Key.RIGHT)) cameraView.x += cameraView.velocity/5;
// keep within some limits
if (cameraView.x &lt; -200) cameraView.x = -200;
else if (cameraView.x &gt; 200) cameraView.x = 200;

// Now, with the camera moved, you need to perform the offset
// of the camera's position to everything else in the scene
for (var i=0; i&lt;objectsInScene.length; i++){
	objectsInScene*.display();
}

};

// make each figure run backAndForth every frame
theScene.onEnterFrame = drive;