The phrase "mere footsteps" is used to describe a very short or small distance. It means that something is so close that you can reach it by walking just a few steps. Full definition
«Based on that experience, I am certain that Islamic militants will do their best to target the proposed World Trade Center mosque and Islamic Center for takeover by radicals intent on imposing their murderous and hateful ideology mere footsteps away from sacred ground in Manhattan. (nystateofpolitics.com)
[1] Mere footsteps from the former epicenter of Occupy Oakland's nightly clashes with police, Holberton's work serves as a critical commentary and an eerie reminder of the (sometimes camouflaged) structures of authority that govern civilian life. (dailyserving.com)
He's able to capture the essence of Florida and its trashy magnificence, as well as the transient nature of life mere footsteps outside the most magical place on Earth. (detroitnews.com)