How can I make this script sit you down, wait 5 seconds, let you get up?

When the player comes in contact with the brick, he will have 3 seconds to climb the obstacle. If he doesn't make it in time, his player will sit down and fall. However, once he falls down he can get up and climb again. How can I make this so that the player sits down, then has to wait 5 seconds before getting up.

Also, another thing if possible make the script work once every 30 seconds because if the player moves inside the brick, it makes the script run 3 times instead of one and he keeps sitting over and over.

function OnTouched(part)	
	local humanoid = part.Parent:FindFirstChild("Humanoid") 
	print("3 SECONDS LEFT TO DO WARPED WALL")
	wait(1)
	print("2 SECONDS LEFT TO DO WARPED WALL")
	wait(1)
	print("1 SECONDS LEFT TO DO WARPED WALL")
	wait(1)
	print("You've failed!")
	wait (0)	
	if (humanoid ~= nil) then
	humanoid.Sit = true
	end
end

script.Parent.Touched:connect(OnTouched)	

--//Variables
local player = game:GetService("Players").LocalPlayer;
local userInputService = game:GetService("UserInputService");

local timeLimit, canJump = 3, true;
local finished = false;

--//Events
userInputService.JumpRequest:Connect(function()
    if player.Character then
        local humanoid = player.Character:FindFirstChild("Humanoid");
        if humanoid then
            humanoid:SetStateEnabled(Enum.HumanoidStateType.Jumping, canJump); --Cancel jump if they can't jump, or let them jump
        end;
    end;
end);

local deb = true;
workspace:FindFirstChild("ClimbStart").Touched:Connect(function(hit)
    if deb then
        deb = not deb;
        local character = player.Character;
        if character then
            if hit.Parent == character then
                delay(timeLimit, function()
                    if not finished then
                        canJump = false;
                        local h = character:FindFirstChild("Humanoid");
                        if h then
                            h.Sit = true;
                        end;
                        wait(timeLimit);
                        canJump = true;
                        if h then
                            h.Sit = false;
                        end;
                    end;
                end);
            end;
        end;
        deb = not deb;
    end;
end);

workspace:FindFirstChild("ClimbDone").Touched:Connect(function(hit) --Green block
    local character = player.Character;
    if character then
        if hit.Parent:IsA("Model") and hit.Parent == character then
            finished = true;
        end;
    end;
end);