"create a command chat system with 4 random commands, add comments to code"

-- server script for command chat system 
local commands = {"dance", "spin", "jump", "wave"} -- list of commands
local prefix = "!" -- prefix for commands

game.Players.PlayerAdded:Connect(function(player)
    player.Chatted:Connect(function(message)
        if string.sub(message, 1, 1) == prefix then -- check if message starts with prefix
            local command = string.sub(message, 2) -- get command without prefix
            for _, cmd in pairs(commands) do
                if cmd == command then -- check if command is valid
                    -- do something based on command
                    if cmd == "dance" then
                        player.Character.Humanoid:LoadAnimation(game:GetService("InsertService"):LoadAsset(123456):GetChildren()[1]):Play()
                    elseif cmd == "spin" then
                        player.Character.HumanoidRootPart.CFrame = player.Character.HumanoidRootPart.CFrame * CFrame.Angles(0, math.rad(360), 0)
                    elseif cmd == "jump" then
                        player.Character.Humanoid.Jump = true
                    elseif cmd == "wave" then
                        player.Character.Humanoid:LoadAnimation(game:GetService("InsertService"):LoadAsset(987654):GetChildren()[1]):Play()
                    end
                end
            end
        end
    end)
end)