I'm new to javascript. I created this div called colorme. I can successfully color it via javascript. Now assuming i want to change the background of `<p>...</p>`, or `<span>`,etc how do i reach it via Javascript? (no jquery).

Like document.getElementById() would work on the div and i reach it. Now i cannot keep giving unique id's to all the elements. How do i reach the inner elements like `<p>` or `<span>`, etc?

```
<div id="colorme">
  <p>Blah Vblah Blah Content</p>
  <span>Blah Vblah Blah Content</span>
</div>

```