gradient animated

local player = game.Players.LocalPlayer
local playerGui = player:WaitForChild("PlayerGui")

local screenGui = Instance.new("ScreenGui")
screenGui.Parent = playerGui

local button = Instance.new("TextButton")
button.Size = UDim2.new(0, 200, 0, 200)
button.Position = UDim2.new(0.5, -100, 0.5, -25)
button.Text = "Hover Me"
button.Parent = screenGui

local gradient = Instance.new("UIGradient")
gradient.Color = ColorSequence.new{
    ColorSequenceKeypoint.new(0, Color3.fromRGB(255, 0, 0)),
    ColorSequenceKeypoint.new(0.4, Color3.fromRGB(255, 0, 0)),
    ColorSequenceKeypoint.new(0.6, Color3.fromRGB(0, 0, 255)),
    ColorSequenceKeypoint.new(1, Color3.fromRGB(0, 0, 255))
}
gradient.Parent = button

local TweenService = game:GetService("TweenService")

local function createTween(object, properties, duration)
    local tweenInfo = TweenInfo.new(duration, Enum.EasingStyle.Linear, Enum.EasingDirection.InOut)
    local tween = TweenService:Create(object, tweenInfo, properties)
    return tween
end

local isHovering = false

button.MouseEnter:Connect(function()
    isHovering = true
    local tween = createTween(gradient, {Rotation = 180}, 1)
    tween:Play()
end)

button.MouseLeave:Connect(function()
    isHovering = false
    local tween = createTween(gradient, {Rotation = 0}, 1)
    tween:Play()
end)