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()