sketch 2 code
<!-- Standard buttons -->
<a class="button" href="#">Anchor button</a>
<button>Button element</button>
<input type="submit" value="submit input">
<input type="button" value="button input">
<!-- Primary buttons -->
<a class="button button-primary" href="#">Anchor button</a>
<button class="button-primary">Button element</button>
<input class="button-primary" type="submit" value="submit input">
<input class="button-primary" type="button" value="button input">