I want to make an interactive human body model with functions below:
- The users click on/touch a specific part of the body, and only the part they click on/touch changes colour, and the change is saved. For example, a user clicks/touches the head of the model, then only the head part turns to be red, and red forever.
- The change can be seen by other users. Just like Google Docs. For example, Mike clicks on the head, then Bob opens the page and sees a model with red head. Then Bob clicks on the left hand. Then Charlie opens the page and sees a model with red head and red left hand.
Is it possible to do so? What kind of tools do I need?