@dotmtxbot is a Telegram bot that can be invoked inline (that is, while typing a message, like @gif and @pic) to generate scrolling dot matrix display GIFs with some text, which then you can send to the current chat.
Dot matrix displays look like this:
The output of the bot looks like this:
If you start the bot and type the command
will send you a message explaining how to use it and what are its parameters.
Here is a short video showing the bot in use: