Criado pelo um youtuber, eu seguiu o tutorial. credito:
// The Coding Train / Daniel Shiffman // https://thecodingtrain.com/CodingChallenges/154-tic-tac-toe-minimax.html // https://youtu.be/I64-UTORVfU // https://editor.p5js.org/codingtrain/sketches/0zyUhZdJD