Overview

To demonstrate you can implement the microservices architecture, write software comprised of three separate programs:

A program that generates pseudo$-$random numbers $($PRNG Service$)$

A program that, given a non$-$negative integer $i,$ returns the $i^{th}$ image in a set $($order doesn't matter$)($Image Service$)$

If $i$ is $$ the number of images, modulo $i$ by the size of the image set

A user interface $($UI$)$ that either has a button or can receive a user command. When the button is pushed or the command is entered...

$($a$)$ UI calls the PRNG Service

$($b$)$ UI calls the Image Service using the pseudo$-$random number from the PRNG Service

$($c$)$ UI displays the image $($or a path to it$)$

The programs can be written in any language$($s$).$