CSS Only Flaming Button GIF
Here is a fancy CSS only button designed by Yusuke Nakaya. When you hover over the button you have a burning effect over the button. This can work well on Halloween themed websites.
If you are having trouble with the pen, try the archived copy on GitHub
Fire Button Snippet
See the Pen Only CSS: 🔥Button by Yusuke Nakaya (@YusukeNakaya) on CodePen.0