If you want to layer 2 images and move the one in the background to give it a cool effect this snippet by Renan C. Araujo will be just what you are looking for. This will be great fo any websites hero section.
If you are having trouble with the pen, try the archived copy on GitHub
Blend Mode Snippet
See the Pen Playing with Blend Modes by Renan C. Araujo (@caraujo) on CodePen.0