Help with making Spears

I have "created" and "coded" a spear (I use those terms lightly, as the texture for the item was made with the mcreator texture generator), using this tutorial. https://www.youtube.com/watch?v=-WVVlWCQtlA

I have encountered a few issues, one being the use animation plays over and over again. My other issues were fixed, like I accidentally toggled the feature that puts the projectile on fire. Does anyone know how to fix the spear so the animation doesn't play over and over?