Stupid questions regarding vectors

[ModemFukka]

I am trying to make a script that will spawn 7 explosive barrels where you aim lined up side by side left to right.
However I cannot seem to figure out what vector coordinates I need to put to achieve this, here is the code I am trying to fix:

stuff[x]:SetPos( Entity(1):EyePos() + ( Entity(1):GetAimVector() * 16))

[Kogitsune]

It'd make sense if you do it this way:

for i = -3, 3 do
  ...
  desired_pos = center + player_eye_angles:Right( ) * spread * i
  stuff[ i ]:SetPos( desired_pos )
  ..
end

Of course it doesn't account for things like spawning them in the world or inside other props, but that is the gist of it.