How can I make my terrain generator completely random?

So, recently i learned the basics of perlin noise and with the help of a youtube tutorial i managed to create a terrain generator. However, one issue with it is that it's not random, which is absolutely pointless.

Could anyone help me with this?

Script :

local X = 200
local Z = 200
local amplitude = 6
local resolution = 90
local frequency = 2
local Grid = {}

local function GenerateWater()
	
	local water = game:GetService("ReplicatedStorage"):WaitForChild("Water"):Clone()
	water.Parent = workspace
	water.Anchored = true
	water.Mesh.Scale = Vector3.new(100000, 250, 100000)
	water.Position = Vector3.new(0, -335, 0)
	water.CanCollide = false
	water.Transparency = 0.5
	water.Material = Enum.Material.Water
	water.BrickColor = BrickColor.new("Electric blue")
	
end

for x = 1, X do
	Grid[x] = {}
	
	for z = 1, Z do
		Grid[x][z] = math.noise(x / resolution * frequency, z / resolution * frequency) * 125
	end
end

for x = 1, X do
	for z = 1, Z do
		
		local YPos = Grid[x][z]
		
		local block = game:GetService("ReplicatedStorage"):WaitForChild("Block"):Clone()
		block.Anchored = true
		
		if YPos < - 36 then
			block.Material = Enum.Material.Sand
			block.BrickColor = BrickColor.new("Cool yellow")
		elseif YPos > 58 then
			
			block.Material = Enum.Material.Cobblestone
			block.BrickColor = BrickColor.new("Grey")
			
		else	
			block.Material = Enum.Material.Grass
			block.BrickColor = BrickColor.new("Bright green")
		end
		
		block.Position = Vector3.new(x * (block.Size.X - 74), (Grid[x][z] - 2) * amplitude, z * (block.Size.Z - 74))
		block.Parent = workspace
		
	end
end

GenerateWater()