How to walk silently like a ninja?

Excuse me, but could you elaborate on the methods and techniques involved in walking silently, akin to the legendary stealth of a ninja? Are there specific exercises or routines that one must undertake to achieve such an elusive level of quietness in their footsteps? Furthermore, what role does mindfulness and control of one's breath play in this pursuit? I'm intrigued by the concept and would love to learn more about how one can emulate the silent prowess of these ancient warriors.