Put the image URL inside the quotation marks; I do this with Tumblr blinkies
<img src=""/>
<img src="https://64.media.tumblr.com/ec3163d2e3298f1e1979a0a8f6b8bd4b/5732e589548c1c67-56/s250x400/721ce55f64739a06ce6cb0789a33255eea9cf898.gifv"/>
It should look like this with the URL, Put it in the section where you want it to appear, such as “About Me” or “Interests”
hope this helps!