By assigning your lights to a group, you can control multiple lights simultaneously (as a group).
To create a group, open your AOne application and on the AOne Home screen tap on Groups (at the bottom).
To add a new group, on the next screen tap the Group icon (in the middle).
Choose a group icon, a name and select devices you want to assign to your group. Tap Save Group.
Now your new created group is ready and you can control it in the same way as a single light unit. Tap on Groups on the AOne app's home screen to see all your groups.
If you wish to repeat the process and create more groups, then under Groups, tap the plus icon in the top right, create new groups and assign more devices: