❗ [SOLVED] [Help] Vision Change

Hey you guys

So I want to have a code which does the following:
You have your normal view.
I want it to change after like 1 second to negative view.
And after another second again back to default.
/repeat /repeat on and on. But i want it to change smoothly.
You know what I'm saying?

So if anyone knows that code please give it to meh

Greetz,
Mr.Mackey
Mmmkay?

[php]
for(;{
self VisionSetNakedForPlayer( getDvar( "mapname" ), 1 );
wait 1;
self VisionSetNakedForPlayer( "cheat_invert_contrast", 1 );
wait 1;}[/php]