/* @import url('http://example.com/example_style.css'); */

/***********************************************/
/* CSS @imports must be at the top of the file */
/* Add them above this section                 */
/***********************************************/

/*****************************************/
/* Start your style declarations here    */
/*****************************************/

<script charset="utf-8" type="text/javascript" src="//js.hsforms.net/forms/v2.js"></script>
        <script>
            hbspt.forms.create({
            portalId: '6131420',
            formId: '89e96225-7a89-4ab1-8b81-ecb7e2df697a',
            onFormReady: function($form, ctx){
              $('input[name="city"]').val('myCity').change();
             }
          });
      </script>