It shows the burning of sparkler which is a fast reaction resulting in smoke and light .
<a href="//commons.wikimedia.org/w/index.php?title=User:Mango.king&amp;action=edit&amp;redlink=1" class="new" title="User:Mango.king (page does not exist)">Prince</a>
CC BY 4.0
<span class="int-own-work" lang="en">Own work</span>