Create then load movies

1

I am trying to create movies via actionscript, and then have them load/nest into another movie, then place/nest that movie into another movie. all my attemps have failed can some one please help me. I placed 2 code attemps below. any help will be greatly apreciated thanks sincerly newwave


var track:MovieClip = new MovieClip();
//a shape is drawn with script
var thumb:MovieClip = new MovieClip();
//a shape is drawn with script
 
var sb:MovieClip = new MovieClip();
this.sb.addChild(track);
this.sb.addChild(thumb);
 
var scrollbox:MovieClip = new MovieClip();
this.scrollbox.addChild(sb);
this.addChild(scrollbox);

I also tried this with no luck


var track:MovieClip = new MovieClip();
//a shape is drawn with script
var thumb:MovieClip = new MovieClip();
//a shape is drawn with script
 
var sb:MovieClip = new MovieClip();
var sb0 = new track();
this.scrollbox.addChild(sb0);
var sb1 = new thumb();
this.scrollbox.addChild(sb1);
 
var scrollbox:MovieClip = new MovieClip();
var sb2 = new sb();
this.scrollbox.addChild(sb2);
this.addChild(scrollbox);