Show Hierarchical Relationships of Content

Tell us what’s happening:
I’m not sure what I’m doing wrong It keeps saying i need six h3 when i have six in my code.
UPDATE: never mined i figured it out

Your code so far

<h1>How to Become a Ninja</h1>
  <h2>Learn the Art of Moving Stealthily</h2>
  <h3>How to Hide in Plain Sight</h3>
  <h4>How to Climb a Wall</h4>

  <h2>Learn the Art of Battle</h2>
  <h3>How to Strengthen your Body</h3>
  <h4>How to Fight like a Ninja</h4>

  <h2>Learn the Art of Living with Honor</h2>
  <h3>How to Breathe Properly</h3>
  <h4>How to Simplify your Life</h4>

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3626.119 Safari/537.36.

@Sir_Eternum, consider deleting this topic if you have figured out the problem.