Repl.it => https://replit.com/
First, you need to create a new project with Node.js runtime. Clone https://github.com/Blackprint/Blackprint.
Open the Console/Shell and let's clone the submodule
$ git clone --depth 1 --recurse https://github.com/Blackprint/engine-js ./engine-js
$ git clone --depth 1 --recurse https://github.com/Blackprint/blackprint.github.io ./editor
$ git clone --depth 1 --recurse https://github.com/Blackprint/remote-control ./remote-control
# You can replace this template with your own module
$ git clone --depth 1 --recurse https://github.com/Blackprint/template-js ./nodes/your-module-name
After that, you can press the Run
button on Repl.it to start the compiler and server.