====== Level 1 Headline ======
This is a <fc #ff0000>rainbow</fc>
==== Level 3 Headline ====

===== Level 2 Headline =====
==== Headline Level 3 ====
=== Headline Level 4 ===
== Headline Level 5 ==

  ==== Headline Level 3 ====
  === Headline Level 4 ===
  == Headline Level 5 ==

By using four or more dashes, you can make a horizontal line:

----

=== Example for equations ===
Ref: [[https://www.dokuwiki.org/plugin:mathjax]]
  * Inline Math (Use dollar signs)
The magnetic <fc #008080>moment of a single</fc> spin is $\mu=\gamma I$

  * Display Math (use double dollar signs)
To display math on its own line, use double dollar signs:
$$ \frac{d}{dx}\left( \int_{0}^{x} f(u)\,du\right)=f(x) $$
or escaped square brackets:
\[ \sin A \cos B = \frac{1}{2}\left[ \sin(A-B)+\sin(A+B) \right] \]

  * A wide range of math environments
\begin{align*}
e^x & = 1 + x + \frac{x^2}{2} + \frac{x^3}{6} + \cdots \\
    & = \sum_{n\geq 0} \frac{x^n}{n!}
\end{align*}

=== Example for video ===


{{ http://101.6.120.23/~yxue/video/song/Row_Row_Row_Your_Boat-SSS.mp4 }}