Lines are moving with different speeds in 3d world. Each line is on the definite distance from you. Define which lines are moving faster, which are moving at average speed, and which are slower. The three lines lying in circle, triangle and square, you have to find out that. It is a little bit difficult to recognize the speed of them in the three dimensional scene. In the later episodes, they will not go in a straight line, but a curl route. Psy line is a puzzle game, available on www.flash-games.net, for your spare time entertainment and relaxing. Examine the lines carefully, before you give the conclusion. Good luck!