Анимация персонажа на основании управления ключевыми кадрами

import flash.events.KeyboardEvent
import flash.events.Event;
stage.frameRate=30;
 
var mleft:Boolean;
var mright:Boolean;
var mjump:Boolean;
var speed:Number=0;
var accel:Number=0.7;
var fric:Number=0.6;
var gravity:Number=0;
 
character.stop();
 
stage.addEventListener(Event.ENTER_FRAME,main);
stage.addEventListener(KeyboardEvent.KEY_DOWN,walk);
stage.addEventListener(KeyboardEvent.KEY_UP,no_walk);
 
function main(e:Event){
    if (mright)
{   
    character.scaleX= scaleX;
    speed+=accel;
    character.play();
    if(character.currentFrame==24)
    character.gotoAndPlay(1);
    character.x+=speed;
}
 
    if(mleft)
{
    character.scaleX= -scaleX;
    speed-=accel;
    character.play();
    if(character.currentFrame==24)
    character.gotoAndPlay(1);
    character.x+=speed;
 
}
    if ((mright==false) && (mleft==false))
{
    speed*=fric;
    character.x+=speed;
}
 
    if (speed>10) speed=10;
    if (speed<-10) speed=-10;
    
    if(mjump&&character.hitTestObject(ground))
    {
        gravity=-15;
    }
    
    character.y+=gravity;
    if (!character.hitTestObject(ground))
    {
        character.gotoAndPlay(25);
        if (character.currentFrame<44)
        character.gotoAndPlay(25);
        gravity++;
        gravity++;
    }
    else 
    gravity=0;
    
    if (character.x-character.width/2<0)
    character.x=character.width/2;
    
    if (character.x+character.width/2>1280)
    character.x=1280-character.width/2;
}
 
function walk(e:KeyboardEvent)
{
    if (e.keyCode==39)
        mright=true;
        
    if (e.keyCode==37)
        mleft=true;
        
    if (e.keyCode==38)
        mjump=true;
}
 
 
function no_walk(e:KeyboardEvent)
{
    if (e.keyCode==39)
        mright=false;
        
    if (e.keyCode==37)
        mleft=false;
        
    if (e.keyCode==38)
        mjump=false;
        
    character.gotoAndStop(1);
    
}