The sea.

Each color is a sine function. The height is constant because sin(t+0*2*pi/5 )+ sin(t+1*2*pi/5)+sin(t+2*2*pi/5)+sin(t+3*2*pi/5)+sin(t+4*2*pi/5)=0 for all t value.

In a column the i-th segment have length sin(t+i*2*pi/5)+1, so the height is always 5.