How can I give and take away a forcefield from the player in this script?

I want a forcefield to be given to the player at this point in the script

for x, player in pairs(players) do
		local char = player.Character
		if not char then
			print(player.Name.." has no character!")
		else
			local humanoidrootpart = char.HumanoidRootPart
			if not humanoidrootpart then
				print(player.Name.." has no HumanoidRootPart!")
			else
				humanoidrootpart.CFrame = workspace.Lobby.SpawnLocation.CFrame + Vector3.new(0,3,0)
			end
		end
		wait()
	end
	clonemap:Destroy()
end

and for it to be taken away at this part of the script

for x, player in pairs(players) do
		local char = player.Character
		if not char then
			print(player.Name.." has no character!")
		else
			local humanoidrootpart = char.HumanoidRootPart
			if not humanoidrootpart then
				print(player.Name.." has no HumanoidRootPart!")
			else
				humanoidrootpart.CFrame = clonemap.Spawn.CFrame + Vector3.new(0,3,0)
			end
		end
		wait()
	end

here is the full script:

local rep = game:GetService("ReplicatedStorage")
local mapsfolder = game:GetService("Lighting"):WaitForChild("Maps")

local booleans = rep:WaitForChild("Booleans")
local variables = rep:WaitForChild("Variables")
local choice1 = variables:FindFirstChild("Choice1")
local choice2 = variables:FindFirstChild("Choice2")
local choice3 = variables:FindFirstChild("Choice3")
local winner = variables:FindFirstChild("Winner")
local timer = 10 --in seconds

while true do
while true do
	local maps = mapsfolder:GetChildren()
	choice1.Value = maps[math.random(1,#maps)]
	table.remove(maps,table.find(maps,choice1.Value))
	choice2.Value = maps[math.random(1,#maps)]
	table.remove(maps,table.find(maps,choice2.Value))
	choice3.Value = maps[math.random(1,#maps)]
	table.remove(maps,table.find(maps,choice3.Value))
	wait(1)
	booleans:FindFirstChild("VotingSession").Value = true
	wait(10)
	booleans:FindFirstChild("RevealVotes").Value = true
	wait(5)
	booleans:FindFirstChild("VotingSession").Value = false
	booleans:FindFirstChild("RevealVotes").Value = false
	local chosenmap = winner.Value
	
	if not winner.Value then
		print("Something went wrong!")
		break
	end
	local map = chosenmap.Value
	local clonemap = map:Clone()
	print("Getting map...")
	wait(1)
	print("Getting map spawn...")
	if clonemap.Spawn then
		print("Success!")
	else
		print("Task failed successfully")
		wait()
		print("Restarting...")
		clonemap:Destroy()
		break
	end
	clonemap.Parent = workspace
	print("Getting players...")
	local players = game:GetService("Players"):GetPlayers()
	for x, player in pairs(players) do
		local char = player.Character
		if not char then
			print(player.Name.." has no character!")
		else
			local humanoidrootpart = char.HumanoidRootPart
			if not humanoidrootpart then
				print(player.Name.." has no HumanoidRootPart!")
			else
				humanoidrootpart.CFrame = clonemap.Spawn.CFrame + Vector3.new(0,3,0)
			end
		end
		wait()
	end
	for i = timer,0,-1 do
		print(i)
		wait(1)
	end
	for x, player in pairs(players) do
		local char = player.Character
		if not char then
			print(player.Name.." has no character!")
		else
			local humanoidrootpart = char.HumanoidRootPart
			if not humanoidrootpart then
				print(player.Name.." has no HumanoidRootPart!")
			else
				humanoidrootpart.CFrame = workspace.Lobby.SpawnLocation.CFrame + Vector3.new(0,3,0)
			end
		end
		wait()
	end
	clonemap:Destroy()
end
end