How to properly make a Vue component with this code?

Question

JavaScript

Very interesting canvas , I want to insert it into a component and connect it during loading. But I don’t understand how to set it up - you need this new component with canvas to be only on the entire parent component, and not on the entire page, and make it on top with a translucent background (so that you can see what is underneath).
Please tell me who understands how to do this)