Flashing Text in UMG when variable equals 0

I am working on a blueprint FPS gmae, and it has a UMG HUD that has been set up for use with the first person template, and I have an area of the screen that displays my ammo, as shown here:

But when the player runs out of ammo, I want some words to come up saying “Reload!”, like this:

that flashes (fades in and out) once whenever the player fires with 0 ammo.
how would I go about doing this? should I create a UMG animation? or just use blueprints?