How to create a coloring page in HTML?

Question

Game development

I need to create a coloring in HTML
I don’t know how:
1. Save the data (clicked and moved to the next one)
2. How to create a zone for all these actions (let’s colorize the car)
3. Details, as I understand it, need to be drawn in svg?
4. How can I make it paint over when hovering over an object and when clicking it?

Answer 1

https://zakraski.ru/play/61/Holodnoe_serdtse