This is a simple concept to do writing like operation using the contours. Please follow the article https://q-viper.github.io/2020/08/28/gesture-based-visually-writing-system-web-app/ for further details.
Currently this system's modes are changed only when contours are appeared above the icon area but it will not always be best idea. So if anyone can train a Gesture Recognition model and then assign a mode then this will add real aid.
Thanks.