Tutorial for making pop art style images in Photoshop

You can change the picture like the artist's style like Roy Lichtenstein's pop art. Because various applications are useful, if you master it, the width expands.

Details are as follows. There is an example, so it is obvious what you can do if you look at it.
Pop Art Inspired by Lichtenstein - Online Tutorial at Melissa Clifton page 1

Actual example
http://www.melissaclifton.com/tutorial-popart3.html
http://www.melissaclifton.com/tutorial-popart4.html
http://www.melissaclifton.com/tutorial-popart5.html
http://www.melissaclifton.com/tutorial-popart6.html
http://www.melissaclifton.com/tutorial-popart7.html
http://www.melissaclifton.com/tutorial-popart8.html
http://www.melissaclifton.com/tutorial-popart9.html

Roy Lichtenstein is such a person.

Roy Lichtenstein

Pop art

Examples of actual works.

Roy Lichtenstein: Art of Poster