dropdown with arrow in html

1<select class="select1">
2    <option href="#">Dropdown</option>
3    <option href="#">Dropdown</option>
4    <option href="#">Dropdown</option>
5    <option href="#">Dropdown</option>
6</select>
7
8<style>
9    .select1{
10        border: none;
11        background-color: cyan;
12        padding: 2px;
13    }
14    
15    .select1:hover{
16        background-color: blue;
17        padding: 10px;
18    }
19    
20</style>