Just let the entity cycle through its whole animations:
Code:

---

action plant_act
{
  my.material = your_material;
  
  while(me)
  {
    ent_animate(me,frame_name,my.skill1,anm_cycle);
    my.skill1 += 8 * time % 100; //change 8 for animation speed
    wait(1);
  }
}

---

Although this code _should_ work it might not