Standard caution symbol (exclamation point within yellow triangle) pulsates slowly but not obnoxiously to highlight important information
within a PPT slide show, a course webpage, a handout (not animated), a syllabus, a test, or an assignment sheet. Image size 115×96 (file size 4.5 KB). Note: You can pause an animated GIF during a PowerPoint Slide Show by Right-Clicking your mouse; you can resume animation with a Left-Click. This mouse-trick works in PPT 2010, but other PPT versions may work differently.
To learn how to make such animated GIFs using PowerPoint and a free online AGIF maker, see PowerPoint slide show Animated GIFs—How to Make and Use