请问先跳一下，然后不停地跑，怎么实现不了，请问该如何修改，下面的代码跳一下，就不跑了。
JumpBy * jb = JumpBy::create(3.0f,Point(2,1),5,1);
auto aniamtion2 =Animation3D::create("model/zhanshi_pao.c3b");
auto animate2 =Animate3D::create(aniamtion2);
Action * ab = RepeatForever::create (animate2);
Action* ac = Sequence::create(jb,ab,NULL);
this->player->getPlayer()->runAction(ac);