This is a simple Mograph test in the Houdini.
You would think this is a complex effect in 3D softwares .
But you can make it in Houdini easily !
Believe me , I made this effect in The Houdini just for 30 min !
You can make it with ScatterSOP , POPNetwork and AddSOP and use Point's color to drive line's scale over the Time :)