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For me, the shape of the fire, is not that important like the "logic" of the fire.
For me pic related, is the best way I can explain that logic.
The more air, the hotter the fire is, the quicker the logs burn.
Less air, and it will be coolder, with more smoke, but will last longer.
Btw op, start a barbecue with paper is not that great achivement.
I usually star the barbecues with just a stick, coals and one match (if I use two matches, I think Im a failure)