Working with the Nine Step Purification Breathing Techniques

 

some Tibetan Lamas show it different as you see from these examples

such as:

Right side channel is white ( anger) (fear)
left channel is red (desire) (hope)
and the central channel is blue ( ignorance)

my personal practice is styled more along this one
"Love the Visuals"

The Nine Purification breath is a pranayama practice from the Tibetan Bon Buddhist tradition.
by Katiza The House Of Yoga

Lama Tsultrim Allione
instruction with explanation

Written instruction with explanation pdf

Latri Nyima Dakpa Rinpoche

another short