Here is the current table I am working with:
<table>
<tr>
<td>a</td>
</tr>
<tr>
<td>b</td>
</tr>
<tr>
<td>c</td>
</tr>
<tr>
<td>d</td>|
</tr>
</table>
I would like to customize this table by making the first two rows have a red background color and the next two rows have a blue background color.