I cannot find a way to run the demo code

[tinanemati]

Hi

How do I get to run your code?

I tried npm run demo

sh: builder: command not found
npm ERR! code ELIFECYCLE
npm ERR! syscall spawn
npm ERR! file sh
npm ERR! errno ENOENT
npm ERR! dash-colorscales@0.0.4 demo: `builder run demo`
npm ERR! spawn ENOENT
npm ERR! 
npm ERR! Failed at the dash-colorscales@0.0.4 demo script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.