Drag this link to your bookmarks bar, then go to (nearly) any site and click it.
If you want more control, open your browser's console (usually by pressing F12) and set these variables:
- strength: any positive number, up to a maximum of about 0.01. By default it will get bigger every time you click 'warp'.
- loop: set to true or false. If true, the site will keep warping forever.
- time: how long the warping should take, in seconds.