Flash focus does an opacity animation effect on a client when it is focused.
### Usage
There are two ways in which you can use this module. You can enable it by calling the `enable()` function:
```lua
bling.module.flash_focus.enable()
```
This connects to the focus signal of a client, which means that the flash focus will activate however you focus the client.
The other way is to call the function itself like this: `bling.module.flash_focus.flashfocus(someclient)`. This allows you to activate on certain keybinds like so: