I want to know how this is expressed

[Kevin]

It’s really hard to help with general “how do I do this” type questions. Please try to break your problem down into smaller steps and take those steps on one at a time.

You might also want to read through this guide:

Guidelines—Asking Questions

Summary (TL;DR) Ask complete questions to get better answers! Be specific. For example: I want to load an image. I tried using createImg() , and I expected the image to be on canvas, but what happened instead was the image showing up below the canvas. Isolate your problem and work in small steps. Share only the code directly related to your problem if it is part of a bigger project, and if something isn’t working, try the smallest code that could do the thing you want. Can we run your code …

I’m closing this thread, as it’s pretty much a duplicate of this one:

I want to know how this is expressed. 03