Brahma, Vishnu & Shiva are normally represented
as shown above in Hindu temples.

It is seen that Brahma has many faces,
representing one who lives life in highest awareness and
one who is always in the mode of creation.
Vishnu is shown above sheltered by the shesh naag (King cobra).
Shesh means 'the remaining' and naag, when translated, means snake.
The snake is normally drawn as a wave and moves in a wave-like form.
The wave symbolizes energy or power, as represented in science.
Therefore, shesh naag actually refers to the remaining power that is
beyond the powers of Brahma, Vishnu and Shiva.
In spirituality, however, naag was understood by simply translating
the word, using a dictionary. It was not understood through
deep meditation and study. As a  result, it was translated as snake.
Above, it is shown that Shiva adorns a snake around the neck.
This actually represents that Shiva is actually a power
- the power that brings a change that is beneficial for all.