I'm currently working on project which uses google blockly in front end to build the logic in the application,and I have developed custom blocks with generators. now my focus is to change the blockly ui to something like in these sites
https://makecode.microbit.org/#editor,
https://scratch.mit.edu/projects/editor/?tutorial=getStarted which supports icons , colors in toolbox area , custom styles in blocks..etc. In the blockly guide its only for changing colors and block styles, but I need to extend blockly further more.
your guidance and advises are warmly welcomed.