I am trying to duplicate (replicate) the OP's (Guy Cothal) code that he posted in his original post. He later said he found a but and got his circuit working by moving the ReceiveEvent from Setup to Loop. I made the same modification, so the code I am running
(which I attached to my last post 5 minutes ago) is the same as the OP's original post with the exception of that one change.
It is not working. The leds don't toggle. I know my ATtiny85's (not Trinkets) work because I tested them with the blink example before loading the I2C code.