复杂一点点了，只是速度有点慢
for( i = 1; i <10; i++ ){    
b0.duplicateMovieClip("b"+i,i);
    }

onEnterFrame=function(){
    b0._x+=(_xmouse-b0._x)*.2;
    b0._y+=(_ymouse-b0._y)*.2;
    for( i = 1; i <10; i++ ){    
    this["b"+i]._x+=(this["b"+(i-1)]._x-this["b"+i]._x)*.3;
    this["b"+i]._y+=(this["b"+(i-1)]._y-this["b"+i]._y)*.3;
    }
}