Hi

This code will show the last x number of images in a folder.

@{
    var folder = Umbraco.Media(1215);

    var lastUpdatedImages = folder.DescendantsOfType("image").OrderByDescending(x => x.CreateDate).Take(4).ToList();
}

@foreach (var image in lastUpdatedImages)
{
    <img src="@Url.GetCropUrl(image, 100,100)" />
}

This should be a good starting point.

Dave