Ribbon button images

This may seem like a silly question, but where do I find the images (gifs) used in the ribbon construction? I have looked through all the downloaded files and folders and cannot find them?

Check the next folder dhtmlxRibbon\samples\common\48
When initializing the component, path to image folder is specified as part of constructor

myRibbon = new dhtmlXRibbon({ parent: "ribbonObj", icons_path: "../common/",