bank building London merry-go-around merry-go-round river shore thames tourists view water wharf amusement around christmas go lights merry night Nyberg ornaments park pirates rig sail ship Tivoli x-mas xmas alert announcement be-careful beware black blocked blocked-path care careful caution communicating communication danger detour directing direction go-around informing lookout observant observe pedestrians safety security sign warning watch watch-out yellow alternative-way arrow discoloration message wording words circle denied directional directive no right turn not allowed not permitted parking permission denied prohibited prohibition red reflective road sign street sign traffic traffic flow verge white ant ants bugs cleaning gathering grains gravel ground holes insects leave mandibles movement ochre on the lookout orange scurrying shadows tidying twigs blend blur blurs colorful colors colour colours experimental fabric gradient hue hues motion series shade shades tone tones variation variations