new_contents: var Tetrinimo = function(args) {
    this.element = args.element;
    var shape = args.shape;
  
    this.blocks = shape.map(function(block) {
      return {x: new Number(block.x), y: new Number(block.y)};
    });
  
    this.row = 0;
    this.col = 5;
  
    for(var block in this.blocks) {
      this.blocks[block].y += this.row;
      this.blocks[block].x += this.col;
    }
  }
  Tetrinimo.prototype.raise = function() {
    this.row--;
    for(var block in this.blocks) {
      this.blocks[block].y--;
    }
  };
  Tetrinimo.prototype.drop = function() {
    this.row++;
    for(var block in this.blocks) {
      this.blocks[block].y++;
    }
  };
  var directToInt = {
    'left': -1,
    'right': 1
  };
  Tetrinimo.prototype.slide = function(direction) {
    this.blocks.forEach(function(block) {
      block.x += directToInt[direction];
    });
  };
  
subject: Add tetrinimo model to tetrinimo.js