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

    d: drift, L = 0.5
    b: sbend, L = 0.5, g = 1    ! g = 1 / bending_radius
    q: quadrupole, L = 0.6, k1 = 0.23

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