text: function Cell(x, y, w, row, col)
  {
  	this.xPos = x;
  	this.yPos = y;
  	this.width = w;
  	this.radius = w / 5;
  	this.letterSize = floor(w / 2);
  	this.letter = ' ';
  	this.color = [255, 255, 255];
  	
  	this.yPos += col * (spacing / 2) + spacing;
  	this.xPos += row * (spacing / 2) + spacing;
  }
  
  Cell.prototype.show = function()
  {
  	stroke(0);
  	fill(this.color);
  	rect(this.xPos, this.yPos, this.width, this.width, this.radius);
  	fill(0);
  	textSize(this.letterSize);
  	textAlign(CENTER, CENTER);
  	text(this.letter, this.xPos + this.width * 0.525, this.yPos + this.width * 0.525);
  }