Drawing of blips on a radar screen.
<ol><li>Three blips</li>
<li>Rotating light beam</li></ol>
Cleanup and PNG conversion of <a href="//commons.wikimedia.org/wiki/File:Blip_(PSF).jpg" title="File:Blip (PSF).jpg">Image:Blip (PSF).jpg</a>.
<a href="https://en.wikipedia.org/wiki/Pearson_Scott_Foresman" class="extiw" title="en:Pearson Scott Foresman">Pearson Scott Foresman</a>
This file has been <b>extracted</b> from another file