You can hook up more lights by using "Charley plexing" You can use this schematic:
http://tiny-circuits.com/wp-content/uploads/2012/09/ASD2411_Rev3.pdf

Hello!  I got a "404"  - I want to do actions on multiple LEDs and would like to see that schematic; is there an alternate location...?
Thanks!

Hello!

I split the topic since that other forum post was pretty old and long - the pinout for the TinyLily processor can be found on the tutorial page under the Notes section: https://learn.tinycircuits.com/TinyLily/Processor_TinyLily_Tutorial/#notes

There are two dropdown menus that you should be able to click to see the pin descriptions. The pinout pictures are also in the photo reel on the product page: https://tinycircuits.com/products/tinylily-mini-processor

Here's a tutorial on using the TinyLily LEDs as well: https://learn.tinycircuits.com/TinyLily/LED_Blink_Fade/
If you want to use multiples of these LEDs, you could remote the resistors for some of them. For RGB LEDs, you can connect as many as you want in a chain.

If you need more help or have more questions - a description of the project you're looking to make would help me help you!

Best,
Réna