Exercise 1 : Buttons

Create 9 visually unique buttons

Optionally:

create unique hover effects for each button using css.
- Tip use the css :hover selector
  #btn-1:hover {}
create unique click effects for each button using javascript and the "click" event button.addEventListener("click", (event) => { }), and/or expand the hover effects using "mouseover" and "mouseout" events

Button 1