Good day to you,
I am a beginner in this game but i wanna lot about pc ,untill know i know how to create a web page but my real problem is how do i code other page.For example i wanna add music page on my webpage,how do i do that???

same as you created your first page.

open your editor, make a new page, save it with a different name like "secondpage.html".

now back on your first page, you can create a link over to it like this...

<a href="secondpage.html"> click to go to second page </a>