beginning[beta_a] = 10.   ! m  a-mode beta function
    beginning[beta_b] = 10.   ! m  b-mode beta function
    beginning[e_tot] = 10e6   ! eV 

    parameter[geometry] = open      ! or closed

    b: sbend, l = 2, angle = pi/4
    f: fork, to_line = extract_line, superimpose, offset = 0.4
    d: drift, l = 2

    extract_line: line = (d)
    extract_line[geometry] = open

    lat: line = (b)         ! List of lattice elements
    use, lat                ! Line used to construct the lattice