How do I make a one-way door? [SOLVED]

I have a game where you're not supposed to be able to enter the hallway you last entered, and I would like to implement a one-way can-collide brick. Is there any way to do that?

Make an invisible brick in front of the entrance that the player walks through to activate the door. Then, have nothing to open the door on the other side. Basically, put no scripts in the door and put it in the invisible brick.

put

door = script.Parent

function onTouch(hit)
	if hit.Parent == nil then return end
	local h = hit.Parent:FindFirstChild("Humanoid")
	if h ~= nil then
		hit.Parent.Torso.Velocity=door.CFrame.lookVector * 10000
	end
end
door.Touched:connect(onTouch)

in door you can change 10000 to the force of the vector