I am making a flood marker for an art installation. I would like to write a mathematical equation up one side of the marker. The work is about a creek flooding - first in 1956 at 3.50 metres, 1986 at 2.75metres, 1988 at 2.50 metres and 2001 at 1metre. My limited maths has come up with - 1956+1986+1988+2001=H20. I would be thrilled with any other suggestions. Thank you, Loz