HI!
What it looks like: https://imgur.com/a/PaHExsp
Here's Fossil 2.15 running on EC2: http://54.79.202.57/register - this link will allow you to create a new account.
Alternatively, the "chat" user (password "chat") can be used if you don't want to make an account. [It used to have the ability to create additional users (with admin privs), with the result that the fossil instance rapidly began spouting SQL errors and I had to reset it, twice. That was fun...]
The instance is completely ephemeral. If this comment is more than a week or so old, expect the above IP to be dead (I'll be cycling the VM).
And yes - note that it's going over HTTP, not HTTPS :P (that would have taken an extra, uhh, while)
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If you're using 'chat': once you've opened the above link, go to "login", login, then locate the new "chat" tab. You can optionally go to Admin > Users and make yourself a new account (the "Add" link is a little hard to see, it's to the far left immediately under the tab bar; also be sure to select "Chatroom" from the far right in the permissions list).