Since most of the cards in the deck are colorless, you can afford to be flexible with your experimenting and not have to worry too much about colored mana, especially since Mox Opal can produce any color.
The basic shell of Affinity should look something like the following:
2-4x Memnite
2-4x Ornithopter
2-4x Vault Skirge
3-4x Signal Pest
4x Steel Overseer
2-3x Etched Champion
2-3x Master of Etherium
4x Mox Opal
2-4x Cranial Plating
4x Blinkmoth Nexus
4x Inkmoth Nexus
Note: There should be a minimum of 6 copies between Memnite and Ornithopter, with 8 being ideal.
Once again, this is not meant to be a complete deck list. It’s more of a guide to understand how the deck functions and a look at the key cards behind it, the purpose of which is to help newer players decide if this sounds like something they want to build or get an idea of how it runs and figure out a way to beat it. What else do you want to learn more about? Let me know in the comments below.