How do i switch from one screen to another???

Question

how do i make it so that theres a loading screen, which switches to the main screen, ive never done this before so i just need some help.

Answer 1

If you want a loading animation that shows for a noticable time, check out:
https://www.sololearn.com/Discuss/2459181/how-can-i-make-a-loading-screen-with-a-time

If you want to navigate to another page using JavaScript, you could do something like:
window.location.href = "http://www.w3schools.com";

More details at:
https://www.w3schools.com/howto/howto_js_redirect_webpage.asp