Hard to explain as im not a teacher or sthg...but u have to know that shapes that are drawn and empty spaces are equally important... it can tell a story just with the balance in the image.
Most of shapes that could be labelled as "abstract" exist yet in nature, but human brain synthetisize (????engl) most of them....and/or absorb them unconsciously....
Logos , just like big inventions actually, draw their shapes from nature, life..... a plane from a bird.... a ...
Squares doesn't exist in nature, neither triangles...these are the visual result of maths.
but maths are made to understand" the nature.
Finally i could say that i personnaly tend to create "new" shapes better than using well known shapes (like pop art would do) , though i spent hours at school doing wellknown shapes, cool tattoos on my desks (yea, maybe u know these good old wood desks) until i dsicover i could invent by myself one day...but still it is an extension of existing shapes...combined...melted....disturbed...to create anothers.
You can always deny knowing. 
Don't ask...it happens often. 
...double post bug......Proc must have knocked over his coke-cola that was sitting on the server rack. 
is dying. 
Wiz 
