See comments of http://panzi.github.com/Browser-Ponies/

ScratchedDisk.js

BrowserPonies.loadConfig({"speed":3,"speakProbability":0.1,"volume":1,"interval":40,"fps":25,"interactionInterval":500,"audioEnabled":false,"showFps":false,"preloadAll":false,"showLoadProgress":true,"fadeDuration":500,"spawn":{"ScratchedDisk":1},"autostart":true,"ponies":[{"behaviors":[{"name":"Stand","probability":0.5,"maxduration":15,"minduration":7.56,"speed":0,"rightimage":"http://i.imgur.com/zCdjk.gif","leftimage":"http://i.imgur.com/fVo9j.gif","movement":"None","auto_select_images":false,"dont_repeat_animation":false,"skip":false,"x":0,"y":0,"rightcenter":{"x":53,"y":48},"leftcenter":{"x":53,"y":48},"group":0},{"name":"Trot","probability":0.5,"maxduration":15,"minduration":5,"speed":2,"rightimage":"http://i.imgur.com/OKpoI.gif","leftimage":"http://i.imgur.com/iRVOf.gif","movement":"Diagonal_horizontal","auto_select_images":false,"dont_repeat_animation":false,"skip":false,"x":0,"y":0,"rightcenter":{"x":53,"y":48},"leftcenter":{"x":53,"y":48},"group":0}],"speeches":[{"name":"Signing in","text":"Scratched Disk, Signing in!","skip":false,"group":0},{"name":"Game on","text":"Game on!","skip":false,"group":0},{"name":"Luna Republic","text":"For the Luna Republic!","skip":false,"group":0}],"categories":["Supporting Ponies","Stallions","Unicorns"],"name":"ScratchedDisk"}]});