-- please credit me (aabbaaii13/15), if you modified this source.
if not game:GetService("Players").LocalPlayer:WaitForChild("PlayerGui"):FindFirstChild("TopbarStandard") then
    local Frame1 = Instance.new("Frame", game:GetService("CoreGui").TopBarApp.TopBarApp)
    local Frame2 = Instance.new("Frame", Frame1)
    local UIListLayout = Instance.new("UIListLayout", Frame2)
    local Frame3 = Instance.new("Frame", Frame2)
    local TextLabel = Instance.new("TextLabel", Frame3)
    local UICorner = Instance.new("UICorner", Frame3)
    Frame1.Size = UDim2.new(1, 0, 0, 48)
    Frame1.Position = UDim2.new(0, 0, 0, 10)
    Frame1.BackgroundTransparency = 1
    Frame2.Size = UDim2.new(1, 0, 0, 44)
    Frame2.Position = UDim2.new(0, 172, 0, 2)
    Frame2.BackgroundTransparency = 1
    UIListLayout.Padding = UDim.new(0, 12)
    UIListLayout.FillDirection = Enum.FillDirection.Horizontal
    UIListLayout.HorizontalAlignment = Enum.HorizontalAlignment.Left
    UIListLayout.VerticalAlignment = Enum.VerticalAlignment.Bottom
    Frame3.Size = UDim2.new(0, 96, 0, 44)
    Frame3.BackgroundColor3 = Color3.fromRGB(18, 18, 21)
    Frame3.BackgroundTransparency = 0.08
    TextLabel.Size = UDim2.new(1, 0, 1, 0)
    TextLabel.BackgroundTransparency = 1
    TextLabel.TextColor3 = Color3.new(1, 1, 1)
    TextLabel.TextSize = 18
    TextLabel.Font = Enum.Font.BuilderSansBold
    UICorner.CornerRadius = UDim.new(1, 0)
    game:GetService("RunService").RenderStepped:Connect(function(f)
        if tick() % 0.1 <= f then
            TextLabel.Text = string.format("%.1f", 1/f) .. " FPS"
        end
    end)
end
pcall(function()
    local Frame = Instance.new("Frame", game:GetService("Players").LocalPlayer.PlayerGui.TopbarStandard.Holders.Left)
    local UICorner = Instance.new("UICorner", Frame)
    local TextLabel = Instance.new("TextLabel", Frame)
    Frame.Size = UDim2.new(0, 96, 0, 44)
    Frame.BackgroundColor3 = Color3.fromRGB(18, 18, 21)
    Frame.BackgroundTransparency = 0.08
    UICorner.CornerRadius = UDim.new(1, 0)
    TextLabel.Size = UDim2.new(1, 0, 1, 0)
    TextLabel.BackgroundTransparency = 1
    TextLabel.TextColor3 = Color3.new(1, 1, 1)
    TextLabel.Font = Enum.Font.BuilderSansBold
    TextLabel.TextSize = 18
    game:GetService("RunService").RenderStepped:Connect(function(f)
        if tick() % 0.1 <= f then
            TextLabel.Text = string.format("%.1f", 1/f) .. " FPS"
        end
    end)
end)