I'm 15, 220lbs, 5'7'' and want to get fatter. How can I do it fast?

Right, my stats: --Age: 15 --Weight: 220lbs --Height: 5'7'' --BMI: 34.5 (Obese) --Waist Size: 42'' More information: OK, basically, I want to be like 350lbs, with a waist of at least 60''. How soon could I be this size and what should I eat to get really fat, a lot... show more Right, my stats:
--Age: 15
--Weight: 220lbs
--Height: 5'7''
--BMI: 34.5 (Obese)
--Waist Size: 42''

More information:
OK, basically, I want to be like 350lbs, with a waist of at least 60''. How soon could I be this size and what should I eat to get really fat, a lot faster.

Also, I'm having chest pains, and tire very easily, even climbing one flight of stairs leaves me sweating but I know the risks.
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