I'm suffering to make this work :'D

Well, I’m kinda new at making games with Unity so I try to make my projects as easy as I can but this problem is getting me crazy.

I was playing this game call “OKAY?” and I saw a really cool animation when you destroy a GO that draws a fine line around the object that gets bigger but no thicker.

So I’m trying to implement it in my current project, which is a copy of Breakout but cooler (XD). But as much as I try, can´t find a solution for this that works well.

I try to use Line Renderer but it can´t be resize, using shaders to make an outline was not really compatible with SVG imagenes which I’m using in my project.

And well, the only thing that works, was to put for images and move them away from the center to make it look like its getting bigger, but when you fade them out, pars of them multiply their alfa and make the feda out not consistent.

So, if somebody have a solution to this problem, I really appreciate the help :'D