<!-- To access the button in css, use a dot (.) and one of the words in "class". I like to define my buttons as "button" and then the specific number so i can customize all the buttons individually while still having a way to customize them all. The "onclick" is used to make functions for JavaScript so that something actually happens when you press the button. -->
<button class="button button1" id="button" onclick="buttonfunction();"> This is a button </button>