This is Pharan's 30-Second Viewer, a (gesture drawing) training tool for helping artists practice their perceptual skills: identifying overall shapes and quickly seeing and capturing the important aspects of shapes and poses that contribute effectively to the feeling, movement, action or realism of a subject.
You can load image files and it will pick out and display a random image from the set every 30 seconds.

WARNING!
Modern browsers don't allow access to just any folder on your computer. So this tool only works with images in the folder where it's saved.

This is how to open a set of images:

1. Copy this file () into the folder where you have your image files.
2. Open this file (), or double-click on it in Finder/File Explorer to open it in your default browser
3. Click the "Browse..." button below to choose files.
4. Browse to the folder where you saved "".
5. Select all the images you want in that folder and choose "Open".