give this to your friend to troll them

local Players = game:GetService("Players")
local Lighting = game:GetService("Lighting")
local Workspace = game:GetService("Workspace")

local localPlayer = Players.LocalPlayer
if not localPlayer.Character then
    localPlayer.CharacterAdded:Wait()
end
local character = localPlayer.Character or localPlayer.CharacterAdded:Wait()

local hrp = character:WaitForChild("HumanoidRootPart")

local humanoid = character:FindFirstChildOfClass("Humanoid")
if humanoid then
    humanoid.WalkSpeed = 0
    humanoid.JumpPower = 0
end

local screenGui = Instance.new("ScreenGui")
screenGui.Name = "WarningGui"
screenGui.Parent = localPlayer.PlayerGui

local messageLabel = Instance.new("TextLabel")
messageLabel.Size = UDim2.new(1, 0, 1, 0)
messageLabel.BackgroundTransparency = 1
messageLabel.Text = ""
messageLabel.TextColor3 = Color3.new(1, 0, 0)
messageLabel.Font = Enum.Font.Creepster
messageLabel.TextSize = 42
messageLabel.TextStrokeTransparency = 0
messageLabel.TextStrokeColor3 = Color3.new(0, 1, 0)
messageLabel.Parent = screenGui

Lighting.ClockTime = 0
Lighting.Ambient = Color3.new(0.1, 0, 0)
Lighting.FogEnd = 30
Lighting.FogColor = Color3.new(0.3, 0, 1)

local neonPart = Instance.new("Part")