农产品精加工企业税率:这是FLASH里的源码，帮忙实现循环播放！

znum = 0;
_root.img2.setMask(_root.mov);
allz = new Array();
allz[0] = [1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3];
allz[1] = [12, 12, 12, 12, 12, 13, 13, 13, 13, 13, 14, 14, 14, 14, 4];
allz[2] = [11, 21, 21, 22, 22, 22, 22, 22, 23, 23, 23, 23, 23, 14, 4];
allz[3] = [11, 21, 29, 29, 30, 30, 30, 30, 30, 31, 31, 31, 24, 15, 4];
allz[4] = [11, 21, 29, 36, 36, 36, 36, 36, 37, 37, 37, 31, 24, 15, 4];
allz[5] = [11, 21, 29, 35, 40, 41, 41, 41, 41, 41, 37, 31, 24, 15, 4];
allz[6] = [11, 20, 29, 35, 40, 44, 44, 44, 44, 42, 37, 32, 24, 15, 5];
allz[7] = [10, 20, 28, 35, 40, 43, 45, 45, 44, 42, 38, 32, 24, 15, 5];
allz[8] = [10, 20, 28, 35, 40, 43, 45, 45, 45, 42, 38, 32, 25, 16, 5];
allz[9] = [10, 20, 28, 35, 40, 43, 43, 43, 42, 42, 38, 32, 25, 16, 5];
allz[10] = [10, 20, 28, 34, 39, 39, 39, 39, 39, 38, 38, 32, 25, 16, 5];
allz[11] = [10, 19, 28, 34, 34, 34, 34, 33, 33, 33, 33, 33, 25, 16, 6];
allz[12] = [9, 19, 27, 27, 27, 27, 27, 26, 26, 26, 26, 26, 25, 16, 6];
allz[13] = [9, 19, 19, 19, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 6];
allz[14] = [9, 9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6];
for (i=0; i<15; i++) {
for (j=0; j<15; j++) {
_root.mov.nemo.duplicateMovieClip("m"+(i-1)*15+j, (i-1)*15+j);
_root.mov["m"+(i-1)*15+j].xnum = i;
_root.mov["m"+(i-1)*15+j].ynum = j;
_root.mov["m"+(i-1)*15+j]._x = i*20+20;
_root.mov["m"+(i-1)*15+j]._y = j*20+20;
_root.mov["m"+(i-1)*15+j].onEnterFrame = function() {
if (_root.allz[this.ynum][this.xnum] == _root.znum) {
this.play();
}
};
}
}
_root.onEnterFrame = function() {
if (znum<46) {
_root.znum++;
}
};
在上面哪里加什么代码能实现循环播放？我是新手请多指教。。。