The first vid needs no explanation. *_*

The second vid is Leader focus but you can see Baby concentrating very hard at the side.I think leader is telling the fans what colour line belong to which member. From the photos I saw, I think Baby is blue, YS is green, JM is red, Leader is purple and KJ is yellow.

credit: 주니크 @ pandoraTV + WWloveHJL2 @ YT



credit: daum + WWloveHJL2 @ YT