Kalacakra in a Yi-dam(god protector) who turns the wheel of life. Kalacakra is the title of a work in one of the divisions of the Kangyur.
It is possible that Kalacakra is a personification of that work. Kalacakra is usually as a Yidam with four head on each of which is the third eye.
He may have twelve or twenty-four arms but never has more than two legs. In his Yi-dam form, he is dark blue. .
Mandala, a Sanskrit word that means a circle and represents the wholeness. Mandalas are recognized generally by concentric circles and probably many other geometric figures.
Mandalas are the most admired and discussed symbol in Buddhism. These are the geometric designs intended to symbolize the universe, and the link is made to their use in Buddhist and Hindu practices.
The word mandala has two parts. The root word is Manda and -la is a suffix .