Okay so when I first got my s8 I turned my phone off and it turned off with black on each side closing in. (If that makes sense, it's like a tv turning off) I thought it was really cool the way it turned off but then later on I don't know if I changed a setting accidentally but now my screw turns off with a fade. So is there a default turn off setting that changes the way your screen turns off without getting an app?