Change the color of an icon on button click

Webix JS
#1

I want to change the color of the cog icon when some data is become availible,
in this snippet click on a button would work for me.
I understand i need to change the HTML element style somehow .
https://snippet.webix.com/q02ruc15

#2

@alex257

Is it like this -https://snippet.webix.com/usim2x9h

#3

webix way
https://snippet.webix.com/khk51mas

#4

Thanks @Meera & @integral