I think you can use a progress bar widget for this purpose. Have you tried it?
It depends on how you’ve built the image.
Kacper made a great suggestion of using a Progress Bar Widget. You can find details of how to use that here. https://www.mendix.com/blog/progressing-progress-bars/
If you have a different image for each stage you could place each one on the page and show / hide it with conditional visibility based on an attribute which holds the current position in the process. If the app is simple that could be a quick solution.
UPDATE: Right click over the image and look at the visibility attribute. You’ll see a condition box like this where you can control if the image is shown or hidden.