They totally failed to stop one guy climbing up the large base of the column in
the centre of the square - and he even managed to do a runner and get away with it.
Each ladder is a thin straight line from the centre of one square up to
the centre of another square.
FYI (if you're wondering why there's a puddle in
the centre of the square and warning signs with umbrellas): in the summer, cables are used to create a light rain shower in the middle of the square.
In
the centre of each square a rectangle painted in the same colour and manner as the rest of the painting subtly reveals itself to the viewer.
He took his lead from the all - over paintings of Pollock, and instead found
the centre of the square canvas.