Spawning radiation sphere/bubble?

I would like to be able to place the radiation bubble at random locations, how can I achieve this?
[DOUBLEPOST=1459040875,1458947350][/DOUBLEPOST]Bump =]

 

Not too sure what you are trying to get at. Do you want random zones of radiation?

 

What I want to be able to deploy is the White Sphere you would normally get from radiation, like the bubble you get in Battle Royale's. I'm a C# developer however I am relevantly new to Unity coding.
[DOUBLEPOST=1459080611][/DOUBLEPOST]This is the test class that I am tying to use

public void AddArea(BasePlayer player, GameObject mov)
{
var col = mov.AddComponent<SphereCollider>();
col.transform.position = player.transform.position;
(col as SphereCollider).radius = 400;
col.enabled = true;
}

As you can tell im quite the Unity noob lmao.
[DOUBLEPOST=1459261645,1459080482][/DOUBLEPOST]any idea?
[DOUBLEPOST=1459264715][/DOUBLEPOST]Like the bubble which decreases in size on the battle royale servers!

I have tried using ddraw however the positions are all to the player perspective/position.