White ball ! Can be found in Joel Duez "Memphis Misraim Arcana Arcanorum" book(legaly published), taught as a technique of the 89° Memphis Misraim.

It is as follows, in 3 steps(being advised to proceed 6 months the first one, then 6 months the 2nd, and so on).

1.inhale downwards-exhale upwards

2.inhale upwards-exhale downwards

3.inhale upwards, while activating one by one all the chakras and reaching maximum expansion, becoming the whole and beyond- exhale, downwards, while activating one by one all the chakras downwards, reaching maximum contraction, becoming the tiniest point possible.

Sorry for the sum up and approximative translation. The key points are clear though. I find interesting this simple way of describing the 3rd part. This direct continuity of the chakras, the expansion/contraction, and Nuit-Hadit. Nice simple image to work the Kundalini.