Half tone print onto paper

When we had the opportunity to screen print on paper, we exposed a halftone design onto a screen and then printed it on paper.
I tried the technique of mixing two colours but it was inexact - I have no experience in this area at all, so it was probably my fault.

I preferred the print done in one colour.  I used coloured paper for this one - green on green.  The image is yet another photo I took at Darebin Parklands that I then played around with in Photoshop.