beginning[beta_a] = 10.   ! m  a-mode beta function
    beginning[beta_b] = 10.   ! m  b-mode beta function
    beginning[e_tot] = 10e6   ! eV   Or can set p0c

    parameter[geometry] = open      ! or closed
    parameter[particle] = electron  ! Default is positron

    q: quadrupole, L = 1, k1 = 0.2
    d: drift, L = 1

    m1:marker,superimpose, ref = q, ref_origin = beginning, offset = 0.3
    m2:marker,superimpose, ref = q, ref_origin = end,offset = 0.4

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