Super guy GUI maybe serversided

local Players = game:GetService("Players")
local player = Players.LocalPlayer

-- Create GUI
local gui = Instance.new("ScreenGui", player:WaitForChild("PlayerGui"))
gui.Name = "SuperGuyGUI"

local button = Instance.new("TextButton")
button.Size = UDim2.new(0, 150, 0, 50)
button.Position = UDim2.new(0.5, -75, 0.8, 0)
button.BackgroundColor3 = Color3.fromRGB(255, 0, 0)
button.Text = "🌈 SUPER GUY"
button.TextColor3 = Color3.new(1,1,1)
button.Font = Enum.Font.GothamBold
button.TextSize = 18
button.Parent = gui

-- Rainbow Function
local function makeRainbow()
    local char = player.Character or player.CharacterAdded:Wait()
    local running = true

    task.spawn(function()
        while running do
            for h = 0, 1, 0.02 do
                local color = Color3.fromHSV(h, 1, 1)
                for _, part in ipairs(char:GetDescendants()) do
                    if part:IsA("BasePart") and part.Name ~= "HumanoidRootPart" then
                        part.Color = color
                        part.Material = Enum.Material.Neon
                    end
                end
                task.wait(0.05)
            end
        end
    end)
end

-- Connect button
button.MouseButton1Click:Connect(function()
    makeRainbow()
end)