code: function PointerGuide(options)
  {
      let defaultOptions = {
          'display'     : false,
          'strokeStyle' : 'red',
          'lineWidth'   : 3
      };
  
      // Now loop through the default options and create properties of this class set to the value for
      // the option passed in if a value was, or if not then set the value of the default.
      for (let key in defaultOptions) {
          if ((options != null) && (typeof(options[key]) !== 'undefined')) {
              this[key] = options[key];
          } else {
              this[key] = defaultOptions[key];
          }
      }
  }
docs: ==================================================================================================================== Class that is created as property of the wheel. Draws line from center of the wheel out to edge of canvas to indicate where the code thinks the pointer location is. Helpful to get alignment correct esp when using images. ====================================================================================================================