A system for a player to play golf includes a member having a surface. A colored area is disposed on the surface of the member, the colored area is yellow which when stared at will produce a violet afterimage. The member or a printed representation thereof is placed on and article of wearing apparel worn by the player so that the player can see the colored area. Prior to hitting a golf ball, the player stares at the colored area for a few seconds, closes his/her eyes and sees the violet afterimage, then opens his/her eyes. The player then hits the golf ball.