anchor.diff:                p.text-center
                   | freeCodeCamp uses passwordless authentication.
                   br
  -                | If you are a new camper just use any email, and sign up instantly,
  -                | or use your existing email with us, if you already have an account.
  +                | Sign up instantly, using a valid email address, or Sign in
  +                | using your existing email with us, if you already have an account.
                 br
                 p.text-center
                     a(href="/signin") Or click here if you want to sign in with other options.
   
           script.
              $(document).ready(function() {
  +
  +             function disableMagicButton (isDisabled) {
  +               if (isDisabled) {
  +                 $('#magic-btn')
  +                   .html('<span class="fa fa-circle-o-notch fa-spin fa-fw"></span>')
  +                   .prop('disabled', true);
  +               } else {
  +                 $('#magic-btn')
  +                   .html('<span class="fa.fa-envelope">Get a magic link to sign in.</span>')
  +                   .prop('disabled', false);
  +               }
  +            }
  +
               $('form').submit(function(event){
                 event.preventDefault();
                 $('#flash-board').hide();
  +              disableMagicButton(true);
                 var $form = $(event.target);
                 $.ajax({
                     type        : 'POST',
  
positive.code:                       .removeClass('alert-info')
                        .addClass('alert-success')
                        .fadeIn();
                  }
                });
              });
  
negative.code:                       .removeClass('alert-success')
                        .addClass('alert-info')
                        .fadeIn();
                      disableMagicButton(false);
                    }
                })
                .done(data =>{
  