code: function (x1, y1, w, h, color, c)
      {
          _c = c || _c
          if (color)
          {
              _c.fillStyle = color
          }
          box(x1 * _scale, y1 * _scale, w * _scale, h * _scale)
      }
docs: draw and fill rectangle
  @param {number} x1 - x
  @param {number} y2 - y
  @param {number} radius - radius
  @param {string} color
  @param {CanvasRenderingContext2D} [c]