As of 11th May, the developers from Instagram presented the new design that came out as part of the 8.0 version of the application. This change include a new icon as well as posts re-positioning for better focus on your own updates.
What the Instagram team announced:
“We have a new look! Our updated icon stays true to the camera and rainbow. The simpler design puts more focus on your photos and videos without changing how you navigate the app.”
You just need to update to the latest version of the application to can get and actually see the changes.
The article URL: https://help.instagram.com/575234329306339