Need help to figure out my outputs (Clock)

Hello! I am trying to make a code for a clock. I have ordered 4 nixie tubes, witch it seems have 10 inputs, one for each digit. The arduino has 13 outputs, and I need 28 to run my clock. I was thinking about controlling transistors, in that way I can almost half my outputs, but I am still a bit off... Is there a counter relay or something that can shift between 10 different output with pulse inputs or something? Or am I completely missing out, and there is another obvious thing to do here?

Thanks for all help!


Aaoo, thanks!

You can't individually set which pins on the 4017 decade counter ...

If you need more control look at shift registers like a 7hc595.