Help with SDK (Zombies Map)

[Buzzofwar]

hello everyone who looks at this, im creating a map for left 4 dead with some other friends and its a Nazi-zombie type of map, with alot of time entered into making rounds and such amount of rounds so far - 75 I am having trubble creating the buildable walls, i saw it in somones map but i didnt know how to make it! do any of you know how to make it so the player can hold E and a little bar will slowly fill up kinda like the blood bar?

[★ ♪ Λlcaṭraȥ ♪ ★]

You are talking about timed_buttons (or something like that). Add me, maybe I can help you. I also made a map with these buttons.