I don't know how to upload a project in (how do I forum) so that I could fix my mistake in the project.
Upload it to an online hosting file service (for example google drive, dropbox, ...) and use the specific feature of the service like Public URL.
Post this public URL in your post.
I have uploaded it to Dropbox. But I don't know how to get the public url. Please teach me.
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First thing you should check out, when using a service you are not familiar with, is its documentation/help : https://help.dropbox.com/
This URL should even display in your native language.
https://help.dropbox.com/files-folders/share/share-file-or-folder
Thank you, I found my solution from your link.it told me to click on a menu on left side.