they are quite similar in style so putting them all in one post would make sense. at least the first 2 images should be put in one post because they are pretty much the same just the colors changed. as for the last two - its up to you. you can divide them into separate posts.
Thank you for the feedback. I know it up to me but sometime help to get feedback to know if right approach or another opinion to help it out. I appreciate the info :)