As the little dot touches each chakra, as it goes up, each bijakshara is chanted. For instance, start with chanting lung, then as the silver dot is moved to the Swadhisthana–wung, then when it moves to the Manipura–rung. So it goes lung, wung, rung, yung, humng, and aum. This is the order. As the silver dot moves from the Mooladhara, step-by-step, touching each chakra to the Sahasrara, the respective bijaksharas are chanted and when it comes down, the bijaksharas are chanted in the reverse order.
Now this order of inhaling, holding the breath and exhaling are done as slowly and deeply as possible, at least 25-30 times. In the last round, when the silvery dot has reached the top of the head, it is visualised as merging with the greater light–the light of Shiva that resides in the Sahasrara chakra or Kailasha. Then, it is held there and the breathing is allowed to become normal and, fixing attention on the light that is merged, it is brought down again a step to the Agya chakra, the forehead chakra, and the sound of aum or pranava is chanted on and on until a state of ecstasy is reached.
It is recommended that the exercise be not done for more than half an hour to 45 minutes, at least for the beginner. If they have any doubts, it is preferable to meet a teacher and personally discuss the questions. If all the conditions are proper and the technique is practiced with complete attention, then after a few days, or maybe even on the first day, depending upon the student, waves of bliss begin to be felt going up and coming down the spine, usually going up.
As the yogi progresses in the Kundalini sadhana, the body and the mind becomes light, there is a glow within, and also an external glow on the face sometimes.