You may place the camera in a certain distance
away from your entity, when you move the entity,
move the camera also and keep it always look at
your entity.

Code:

---

action yourEntity
{
   while(1)
   {
      // entity move code
      //.....

      // Place the camera in a certain distance 
      // away from the entity
      camera.x = my.x + 15;   // play with 15
      camera.y = my.y + 15;   // play with 15
      camera.z = my.z + 2;    // play with 2
	
      // Always look at the entity
      vec_diff(temp,my.x,camera.x);
      vec_to_angle(camera.pan,temp);
      wait(1);
    }
}

---