Updated README

README.md

@@ -7,3 +7,17 @@ It was cobbled together from the following projects, so huge thanks to them:
 - https://github.com/KCarlile/guitar-diagrams-js - Drawing a customizable fretboard
 - https://tonejs.github.io/ - Playing audio
 - https://github.com/nbrosowsky/tonejs-instruments - Guitar sound samples
+
+It is defined as a web component, so you can use it by including `guitar-diagrams-web-component.mjs` and using the component.
+
+### Example
+```html
+
+<script type="module" src="js/src/guitar-diagrams-web-component.mjs"></script>
+
+<my-fretboard canvas-id="myCanvas" orient-horizontally="true" fret-count="6" scale-factor="1">
+  <marker string="4" fret="2"></marker>
+  <marker string="3" fret="2"></marker>
+  <marker string="2" fret="2"></marker>
+</my-fretboard>
+```