Multitasking mobile app needs a new icon

I have a multitasking app that helps to switch between installed apps using a hidden window. You can watch the video inthe link below to give you more idea how the app works and looks like. I'm basically looking for a new modern, bold icon that give the message of being a modern multitasking launcher.

Link to my app
https://play.google.com/store/apps/details?id=com.bialy.zonelauncher

Icon designs that I like
https://play.google.com/store/apps/details?id=mindnotes.note.notepad.notebook.memo.stickynotes

https://play.google.com/store/apps/details?id=org.mozilla.firefox

https://play.google.com/store/apps/details?id=com.microsoft.bing

https://play.google.com/store/apps/details?id=io.hexman.xiconchanger