js-tetris - piece hard-coded

piece.js

class Piece {  
  constructor(ctx) {
    this.ctx = ctx;
    this.color = 'blue';
    this.shape = [
      [2, 0, 0], 
      [2, 2, 2], 
      [0, 0, 0]
    ];
    
    // Starting position.
    this.x = 3;
    this.y = 0;
  }
}