How do I make this synth sound?

[Elektronikz]

It sounds like a simple square with reverb, but I can't get it. I have no idea really how to just explain it, but here are a couple of examples.

/watch?feature=player_embedded&v=XmbGv1qWZw4

At about 2:20

/watch?feature=player_embedded&v=6bDUkxkcy7A

At about 1:19

Any ideas?

 

[BeatGenerals]

Purity, "pw for president" preset in Leads is pretty close and a good start.