How to start and pause glow?

[ChrisDongWooKim]

In advance, Thx to contribute this awesome widget for us.
I want it to use as a button working effects that people get noticed it is on the working.
So I write code like below

AvatarGlow(
              glowColor: Colors.blue,
              endRadius: 90.0,
              repeat: _isWorking? true: flase,
              child: Padding(
              ...button images
             )
)

but the thing is that it works only one time.
So I want to know how to the effects on and off?

Thx :D