VR 360 how to float mc in front?

Hi everyone! 

I'm testing VR 360 for Canvas HTML5 and would like to have some movieclips stuck on the screen, but I can not figure out how to do it.
I would like to add a compass rose to a corner and rotate it along with the panoramic, but I have no idea where or how to start, I didn't identify how to refer to the sphere position or rotating values, nither how to float the compass rose mc on a fix position of the canvas. 

I have found some adobe info here: 
https://helpx.adobe.com/animate/using/virtual-reality.html 
But I have lost interpreting virtual reality at runtime

Any clue or tip will be helpful
thank you