How to visualize customized dipole source for inspection?

[rolly-ng]

Hi all, I am looking into these two examples and I am using Paraview to inspect my model,
(1) http://simpetus.com/projects_scheme.html#meep_oled
(2) https://meep.readthedocs.io/en/latest/Scheme_Tutorials/Custom_Source/#stochastic-dipole-emission-in-light-emitting-diodes

I would like to randomized the position and the phase of these dipole emitters in my model and I would like to inspect their position before running my model. Can anyone check if my code is correct? and how can I visualize the dipoles in Paraview?

;; to generate random number
(define random-num (lambda ()
(let ((time (gettimeofday)))
(set! random-state (seed->random-state (+ (car time) (cdr time)))))
(if (> (random:uniform) 0.5) (random:uniform) (* -1 (random:uniform)))))

;; to generate random dipoles
(define-param perp-dipole? true)
(define src-cmpt (if perp-dipole? Ez Ex)) ; current source component
(define-param num-src 10) ; number of point sources
(set! sources
(map (lambda (cz)
(make source
(src (make gaussian-src (frequency fcen) (fwidth df)))
(component src-cmpt)
(center (* 0.1 cz) (* 0.1 cz) (* 0.1 cz)))
(amplitude (exp (* 0+2i pi (abs (random-num)))))))
(arith-sequence (/ num-src) (/ num-src) num-src)))