You can find what you need here.
https://github.com/wilsonb/arduino/tree/master/libraries
This design was using the ATTINY 2313 which has 2K of memory which wasn't large enough for the entire program. I went with the ATTINY4313. It is the same except for 4K.
I've just recently began using Arduinos And these Tiny chips. I haven't been able to figure out why the "Pin in Code" is different from the Chip pins.