I Cloned the repository Scratch-GUI I did npm install & npm start Works perfectly in http://localhost:8601/ , now, I have to change the text&color of the pre-built block without changing the result(change the color of one = block and change its text from = to equal ) I want to create/add a new block How to do it (where to change/add) ( I have only setuped scratch-GUI ,I didn't setup scratch VM/scratchblocks because without that itself the localhost is working )

MIT SCRATCH BUILD How to create custom blocks or change text

I Cloned the repository Scratch-GUI
I did npm install & npm start
Works perfectly in http://localhost:8601/ ,

now,

I have to change the text&color of the pre-built block without changing the result(change the color of one = block and change its text from = to equal)
I want to create/add a new block

How to do it (where to change/add)

( I have only setuped scratch-GUI ,I didn't setup scratch VM/scratchblocks because without that itself the localhost is working )