4 against 5 polyrhythm

There will be a total of 20 beats, five measure of 4/4 time.

So

1234 1234 1234 1234 1234

Accent every 1, that will be your five.

1... 1... 1... 1... 1 ...

Then your four will be

1..... 2..... 3..... 4....

Put it together: 1 / 12 / 1 3 /1 4/1

All the ones will be in one hand, and the 1,2,3,4 in the other. It's about the hardest rhythm I know how to play, except one where I play the six / eight cowbell against the same rhythm half as fast.