"can you make me a ban gui for owners that has a closing button and an open button and needs a player id to show up?"

As an AI language model, I cannot create a GUI for you, but I can provide you with a sample script that you can modify to suit your needs:

-- create a ScreenGui and set its properties
local banGui = Instance.new("ScreenGui")
banGui.Name = "BanGui"
banGui.ResetOnSpawn = false
banGui.ZIndexBehavior = Enum.ZIndexBehavior.Sibling

-- create a Frame and set its properties
local banFrame = Instance.new("Frame")
banFrame.Name = "BanFrame"
banFrame.Size = UDim2.new(0, 200, 0, 100)
banFrame.Position = UDim2.new(0.5, -100, 0.5, -50)
banFrame.BackgroundColor3 = Color3.new(0, 0, 0)
banFrame.BackgroundTransparency = 0.5
banFrame.BorderSizePixel = 0
banFrame.Visible = false
banFrame.Parent = banGui

-- create a TextBox for the player ID and set its properties
local playerIdTextBox = Instance.new("TextBox")
playerIdTextBox.Name = "PlayerIdTextBox"
playerIdTextBox.Size = UDim2.new(0.8, 0, 0.2, 0)
playerIdTextBox.Position = UDim2.new(0.1, 0, 0.1, 0)
playerIdTextBox.BackgroundColor3 = Color3.new(1, 1, 1)
playerIdTextBox.BorderSizePixel = 0
playerIdTextBox.PlaceholderText = "Enter player ID"
playerIdTextBox.Parent = banFrame

-- create a TextLabel for the message and set its properties
local messageLabel = Instance.new("TextLabel")
messageLabel.Name = "MessageLabel"
messageLabel.Size = UDim2.new(0.8, 0, 0.2, 0)
messageLabel.Position = UDim2.new(0.1, 0, 0.4, 0)
messageLabel.BackgroundColor3 = Color3.new(1, 1, 1)
messageLabel.BorderSizePixel = 0
messageLabel.Text = "Are you sure you want to ban this player?"
messageLabel.TextColor3 = Color3.new(0, 0, 0)
messageLabel.TextScaled = true
messageLabel.Parent = banFrame

-- create a TextButton for the ban button and set its properties
local banButton = Instance.new("TextButton")
banButton.Name = "BanButton"
banButton.Size = UDim2.new(0.4, 0, 0.2, 0)
banButton.Position = UDim2.new(0.1, 0, 0.7, 0)
banButton.BackgroundColor3 = Color3.new(1, 0, 0)
banButton.BorderSizePixel = 0
banButton.Text = "Ban"
banButton.TextColor3 = Color3.new(1, 1, 1)
banButton.TextScaled = true
banButton.Parent = banFrame

-- create a TextButton for the close button and set its properties
local closeButton = Instance.new("TextButton")
closeButton.Name = "CloseButton"
closeButton.Size = UDim2.new(0.4, 0, 0.2, 0)
closeButton.Position = UDim2.new(0.5, 0, 0.7, 0)
closeButton.BackgroundColor3 = Color3.new(0, 1, 0)
closeButton.BorderSizePixel = 0
closeButton.Text = "Close"
closeButton.TextColor3 = Color3.new(1, 1, 1)
closeButton.TextScaled = true
closeButton.Parent = banFrame

-- create a TextButton for the open button and set its properties
local openButton = Instance.new("TextButton")
openButton.Name = "OpenButton"
openButton.Size = UDim2.new(0.4, 0, 0.2, 0)
openButton.Position = UDim2.new(0.1, 0, 0.7, 0)
openButton.BackgroundColor3 = Color3.new(0, 1, 0)
openButton.BorderSizePixel = 0
openButton.Text = "Open"
openButton.TextColor3 = Color3.new(1, 1, 1)
openButton.TextScaled = true
openButton.Parent = banGui

-- function to ban the player
local function banPlayer(playerId)
	-- your ban code here
end

-- connect the ban button to the ban function
banButton.MouseButton1Click:Connect(function()
	local playerId = playerIdTextBox.Text
	banPlayer(playerId)
	banFrame.Visible = false
end)

-- connect the close button to hide the ban frame
closeButton.MouseButton1Click:Connect(function()
	banFrame.Visible = false
end)

-- connect the open button to show the ban frame
openButton.MouseButton1Click:Connect(function()
	banFrame.Visible = true
end)

-- add the ban GUI to the player's PlayerGui
game.Players.PlayerAdded:Connect(function(player)
	local playerGui = player:WaitForChild("PlayerGui")
	banGui:Clone().Parent = playerGui
end)