CodePen Embed - ZEXBpQa

<h1>HTML/CSS Tutorials</h1>
<h2>HTML</h2>
<h2>CSS</h2>
<h2>Bootstrap</h2>
<h2>W3.CSS</h2>

<h1>Scripting Tutorials</h1>
<h2>JavaScript</h2>
<h2>jQuery</h2>
<h2>React</h2>

<h1>Programming Tutorials</h1>
<h2>Python</h2>
<h2>Java</h2>
<h2>C++</h2>

body {
  counter-reset: section;
}

h1 {
  counter-reset: subsection;
}

h1::before {
  counter-increment: section;
  content: "Section " counter(section) ". ";
}

h2::before {
  counter-increment: subsection;
  content: counter(section) "." counter(subsection) " ";
}

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