Buddhist-Meditation-Systematic-and-Practical

The first eye is visualized inside the skull as being in the
position corresponding to the point between the
eyebrows outside. It is a wrathful wisdom-eye, blue in
color. The meditator uses this eye to look up at the
palace.
b. Second day. Visualize two eyes inside the skull,
whose inner positions correspond to the two outer eyes.
These inner eyes are also wrathful and, radiating many
colors, stare at the back of the skull where two more
eyes are visualized. The two in the back of the skull are
like caves or openings and seem very bright and
transparent.
c. Third day. Visualize the eyes mentioned in the above
two days' samapatti; that is, the three eyes in the front
staring across the palace to the eyes in the back. An
extra eye in the back should be visualized to make up
three pairs.
d. Fourth day. The three eyes in the front and those in
the back are seen to be turning to look at each other and
from each one come rays of light. This visualizing
process completes the first stage.
The second begins when the light rays from each pair of
eyes meet. Then the whole body is filled with light as if
from a rainbow.
e. Fifth day. Visualize a purple-colour mani (jewel) in
536