Hi I'm getting two error messages in Flash when using actionscropt 3.0

"Topbar,Layer 'Action Layer',Frame 1,line 12 1084: syntax error: expection semicolon before add.

"Topbar,Layer 'Action Layer',Frame 1,line 12 1084: syntax error: expection rightbrace before semicolon

Here is my code could anyone give some insight to what is actually happening thanks and help on rectifying the issue thanks.

clip = Number(random(7)) + 1;
while (Number(clip) <= 7)
{
   clip = Number(clip) + 1;
   Scale = Number(random(80)) + 1;
   setProperty("/star", _x, Number(random(800)) + 10);
   setProperty("/star", _rotation, Number(random(330)) + 50);
   setProperty("/star", _xscale, Scale);
   setProperty("/star", _yscale, Scale);
   setProperty("/star", _y, Number(random(800)) + 50);
   n = Number(n) + 1;
   bn = "star" add n;
   duplicateMovieClip("star", bn, n);
   set(bn add ":n", n);
} // end while
clip = "0";