-- command script, this only supports commands that don't affect a player, or have a value needed

local admins = {
    ["R0bustic"] = true  -- do not put your name here, it gets automatically done
}
local prefix = ":/"

game.Players.PlayerAdded:connect(function(p)
    if admins[p.Name] or p.UserId == game.OwnerId then
        p.Chatted:connect(function(msg)
            local leng = prefix:len()
            if msg:sub(1,leng) == prefix then
                local c = msg:sub(leng + 1):lower()
                if c == "killall" then -- make your commands all lowercase
                    -- this is your code v
                    local a = game.Players:GetChildren()
                    for _,v in pairs (a) do
                        if a.Character then
                            a.Character:BreakJoints()
                        end
                    end
                    -- this is your code ^
                end
                if c == "reset" then
                    if p.Character then
                        p.Character:BreakJoints()
                    end
                end
            end
        end)
    end
end)