ok, i have problems here, im trying to make this fps-independent
Code:

---

		c_move(the_penguin, nullvector, vector(0,0,-(fall_length)), IGNORE_ME | IGNORE_PASSABLE);
		if (heightcheck > the_penguin.z)
		{
			if ((heightcheck - the_penguin.z) < fall_length)
			{
				fall_length = 0;
			}
			fall_length += (fall_speed / 1 ) * time_step; // Heres A Desperate attempt :p
		}
		else
		{
			fall_length = 0.1;	
		}
		heightcheck = the_penguin.z;

---

this code is executed once every frame...

Any ideas?