How to Find the Secret Path to Chica's Magic Rainbow Minigame(PLZ READ DESC)

When you first go to the tree to the "Graveyard", you will need to press "w" for a few seconds then go towards the tree. Follow the path and you will end up at the Minigame. WHATEVER YOU DO, DO NOT TURN THE VOICES OFF ON THE MINIGAME!!! IT'S NOT GOOD! Good luck?.... =\