substack.net
add #text= to the end of the page to set different messages for example https://substack.net/wip/bz7.html#text=hmm but not quite everything works yet
and you can give it parameters from the url to make it more interesting. for example: https://substack.net/wip/bz6.html#grid=160,40&text=%C2%BFWhat%20is%20going%20on?%20Testing,%201,%202,%203...&size=38000,8000&offset=500,3000
add #text= to the end of the page to set different messages for example https://substack.net/wip/bz7.html#text=hmm but not quite everything works yet