Galaxy s6 edge has a blue box jumps around my screen

[AC Question]

After the update, my phone has a blue box that jumps around my screen. It reminds me of the blue lines that would go up and down the screen before this update. Holding the home button down for three times does not work.

 

[B. Diddy]

Welcome to Android Central! Is TalkBack turned on? https://support.google.com/accessibility/android/answer/6283677?hl=en&ref_topic=3529932

If it isn't, then go to Settings>Developer Options​ and see if anything is turned on there.