sonar as a class to any element to activate.
sonar-infinite to make the animation loop forever.
You can use
sonar-stroke for border animation, or
sonar-fill for background animation.
sonar-delay to set the animation delay to 1s. You can also use
sonar-delay-longer for different timings
Sonar will inherit the border/background colors. But sonar supports all the bootstrap colors, so you can use
All colors are compatible with