The one and only thing required is to free oneself from the bondage of mind and body alike, putting the Buddha's own seal upon yourself. If you do this as you sit in ecstatic meditation, the whole universe itself scattered through the infinity of space turns into enlightenment. This is what I mean by the Buddha's seal.
Another thing that you really do when you play, that you're supposed to do, is colors. You know, you cannot play with one color. If you play with one color, again, it's like watching a beautiful painting, a drawing, but it's all in blue or it's all in red. May be very nice, but not very interesting.