Show modal with delay time when user first time come on website

  $(document).ready(function(){

    if(localStorage.getItem('#exampleModalCenter')!=='true')

    {

      $('#exampleModalCenter').modal('show');

    }

    localStorage.setItem('#exampleModalCenter','true');

    if(localStorage.getItem('#exampleModalCenterform')!=='true')

    {

      setTimeout(function(){

        $('#exampleModalCenterform').modal('show');

    }, 30000);

   

    }

    localStorage.setItem('#exampleModalCenterform','true');

  })