Need A Custom Script ASAP

Hello, We recently purchased our 3rd dedicated server from [login to view URL] , and we are in the process of setting it up and testing it. We are trying to test our servers ability to handle overloading and to see if our personal firewall. We need a “safe” script, or program that when uploaded to the server will attempt to perform a DOS attack against itself, or perform something that will consume all of the servers resources in an attempt to crash the server. This program of script should be able to remove VERY easily, and will not attack any server other than our own to stay within legal guidelines. If you are wondering if this is legal, I can tell you from experience that a client may crash his own server if they are the owner of the server with root access, and are using it for the sole purpose of testing their own server, which is what we are doing. This should be a very easy task, as I am sure most of you out there know of a free script or program that can be used. Just remember that this script or program must be able to be removed and turned off easily without harm. I would also need to download the script from you, or you can send me the code to upload to my site through an email.