Pentagrams and Hexagrams, invoking and banishing?? Options

I'm not quite sure if I fully grasp this whole pentagram and hexagram thing yet. so I'm going to post what I think is going on and then leave it open for corrections.

There's a banishing and invoking varient of the pentagram and hexagram for each element.
Now in raw assumption a banishing pentagram of fire would remove the presence of any energy of the element of fire? And likewise with other pentagrams? Or is it different than that.

And an invoking pentagram of fire would add the presence of the element's energy?

This is what's really puzzling me, the purposes of these. Aside from LBRP and LBRH which are well explained. But could someone give an example of uses and how one would might go about the use of these other pentagrams and hexagrams?

Thanks

the banishing pentagrams are for banishing a certain element. and with that the effects it has on you, freeing you from the influence of that energy. If you feel sad you could do the banishing ritual of water.
(or the invoking ritual of air)

Ah, this may not fit this topic too well but i'll post it anyways (a short version anyhow, will probably post a more single compelete topic on it later)

The same effect for not wanting to feel sad anymore (for example) as you said would be to either banish water, or invoke air.

This is why i use a modified pentagram (lbrp) compared to the one i see in my GD manual. (IMG:style_emoticons/default/wink.gif)

To get a better view of the pentagram i'll draw it here with numbers:

5
4 3
1 2

(1 = lower left corner, 2= lower right corner, 3= upper right corner, 4= upper left corner, 5= the top of the pentagram)

To banish eart for example in GD (i think i remember correctly) would be to go from 1 to 5 and continue drawing the pentagram from there.

I however use this.

1= earth
2= water
3=air
4=fire
5=spirit

so to banish earth i would go from 1 to 3 and continue and to invoke earth, i would go from 3 to 1

(banish earth = from earth)
(invoke earth = to earth)

It makes alot more sense to me than the GD one, however, as i write this, i see (also with regards to the elemental ladder post i made before) that maybe water and air should have the opposite instead of earth and air, hmm, i'll have to think about that. (IMG:style_emoticons/default/wink.gif)