Given a folder with images in it, create an HTML page named index.html that contains links to each JPEG file in the directory as follows:
Write a function that creates a string of the path to a directory
Generatea thumbnail (half the size) copy of each image
Use makeEmptyPicture to create a blank picture in the correct size, then scale down the original picture into the blank picture
Name the new image "half-" + the original filename (e.g., if the original filename was fred.jpg, save the half-size image as half-fred.jpg). The anchor in the link to each full-size picture should be the half-size image.