How to make Capture The Flag game map change?

Hey i was thinking how to make map change in CTP game Script by Roblox:

local MapManager = {}

-- Local Variables
local MapSave = Instance.new('Folder', game.ServerStorage)
MapSave.Name = 'MapSave'

-- Initialization

local MapPurgeProof = game.Workspace:FindFirstChild('MapPurgeProof')
if not MapPurgeProof then
    MapPurgeProof = Instance.new('Folder', game.Workspace)
    MapPurgeProof.Name = 'MapPurgeProof'
end

-- Functions

function MapManager:SaveMap()
    for _, child in ipairs(game.Workspace:GetChildren()) do
        if not child:IsA('Camera') and not child:IsA('Terrain') and not child:IsA('Folder') then
            local copy = child:Clone()
            if copy then
                copy.Parent = MapSave
            end 
        end
    end
end

function MapManager:ClearMap()
    for _, child in ipairs(game.Workspace:GetChildren()) do
        if not child:IsA('Camera') and not child:IsA('Terrain') and not child:IsA('Folder') then
            child:Destroy()
        end
    end
end

function MapManager:LoadMap()
    spawn(function()
        for _, child in ipairs(MapSave:GetChildren()) do
            local copy = child:Clone()
            copy.Parent = game.Workspace        
        end
    end)
end

return MapManager