I am making a nice looking door that isn't an anchored brick that you can walk through. I am making a click door and the door's screen will quickly lower to allow a player to walk through.

Here's the script:

local gid = script.Parent.Configuration.GroupID
local ttw = script.Parent.Configuration.TimeToWait
local door = script.Parent.door
local l = script.Parent.Light
local d = false
local need = false
local ori

if gid.Value == 0 then
	need = false
else
	need = true
end

function open(p)
	if d == false then d = true else return end
	if need == true and p:IsInGroup(gid.Value) or need == false then
		l.BrickColor = BrickColor.new("Toothpaste")
		for i = door.CFrame.Y, door.CFrame.Y-door.Size.Y+0.2, -0.1 do
			door.CFrame = CFrame.new(Vector3.new(door.Position.X, i, door.Position.Z))
			wait(-1)
		end
		wait(ttw.Value)
		for i = door.CFrame.Y, door.CFrame.Y+door.Size.Y+0.2, 0.1 do
			door.CFrame = CFrame.new(Vector3.new(door.Position.X, i, door.Position.Z))
			wait(-1)
		end
		l.BrickColor = BrickColor.new("New Yeller")
	else
		Error()
	end
	d = false
end

function Error()
	l.BrickColor = BrickColor.new("Really red")
	wait(.5)
	l.BrickColor = BrickColor.new("New Yeller")
	wait(.5)
	l.BrickColor = BrickColor.new("Really red")
	wait(.5)
	l.BrickColor = BrickColor.new("New Yeller")
	wait(.5)
	l.BrickColor = BrickColor.new("New Yeller")
end

script.Parent.door.ClickDetector.MouseClick:connect(function(C)
	if C ~= nil then
		open(C)
	end
end)

I don't get anything in the output and the door lowers SLOWLY not quickly. I don't want people to hate my game just because the doors are incredibly slow.

Here is a graph of the door (with labels)

DOOR

I don't know how to fix this and I hope someone can help me.