How can I build up pecs FAST?

How can I build up chst (pectoral) muscles fast (in a week or faster). I'm 13, I practice basketball(5'7'' 130 lbs) and I practice almost every day. How can I define my pecs + my arms because I look kinda skinny!
Update: + I can't afford going to the gym and I don't have weight equipment at home.
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