Gradient Button with Animation

<div class="ctn">
<a href="" class="button b-green">Green Button</a>
<a href="" class="button b-pink">Pink Button</a>
<a href="" class="button b-red">Red Button</a>
<a href="" class="button b-orange">Orange Button</a>
<a href="" class="button b-blue">Blue Button</a>
<br />
<a href="" class="button2 b-green rot-135">Green button</a>
<a href="" class="button2 b-pink rot-135">Pink button</a>
<a href="" class="button2 b-red rot-135">Red button</a>
<a href="" class="button2 b-orange rot-135">Orange button</a>
<a href="" class="button2 b-blue rot-135">Blue button</a>
</div>