1. Step 1: Slide down the notification bar, and click the setting icon button in the upper right corner, as shown below.

2. after entering the setting page, select and click the "show" option.

3. after entering the display page, select and click the option of "curved side screen".

4. after opening the curved side screen page, select and click "side screen flash" as shown in the figure below.

5. enter the side screen flash menu, and select and click the "advanced settings" option below.

6. finally, in the advanced settings menu, you can set the color of the side screen flash as required.