Some of the group are given the task of forming a "rainbow", see picture in video.
The game requires a lot of trust, communication and cooperation within the group as well as it needs to touch each other.
It is important that the individuals can trust each other and are ready to touch each other, naturally this takes some experimentation and it is good to allow the group to try to decide for themselves what is not going on and why, but help / give clues what could be done better. go if necessary, and then guide with e.g. communication but not how best to line up or who should be where.