Learning a procedure to respond appropriately to impulses is described on the link at http://marvinmarshall.com/impulsemanagement.html.
Level C for COOPERATION is in green, as is Level D. Although the goal for young people is to strive for level D motivation, either of these two levels is acceptable.
Level C for CONFORMITY is in YELLOW to remind people to reflect—to be cautious (as in a yellow traffic signal)—before engaging in an activity suggested by a peer. This is especially the case when the suggestion will lead to inappropriate or irresponsible behavior.
Having a visible reminder, as the cards, assists young people to make responsible choices. The reverse of the cards has the visual for an impulse control technique.