title: Which files to edit for HTML/CSS in my application (ruby)
body: <p>I made my application with the following introduction:
  <a href="http://guides.rubyonrails.org/getting_started.html" rel="nofollow noreferrer">http://guides.rubyonrails.org/getting_started.html</a></p>
  
  <p>Now I want to make it more colourful etc (CSS f.eg).
  I found now the JavaScript and CSS files, but I dont know which file are responsible for the editing.</p>
  
  <p>[![enter image description here][1]][1]</p>
  
  <p>Which file should I use for editing the websites?</p>