Gather a number of performers (minumum of 4)
Split into 4 groups (roughly even numbers)
Each group follows a single area (top left, top right, bottom left or bottom right)
The screen will show black for 8 seconds (a timer is counting the seconds in the centre of the screen)
Then play according to the colour code:
Red = don’t play
Green = play
Yellow = either play or don’t play it’s up to you.
Play a single note of your choice for the duration that is shown on the screen, fading in and out as smoothly as possible.

This piece uses a web based score which can be found here:

http://simonbelshaw.co.uk/mm41/mm41Intro.html