On the 10th of Juli in Merksem there was a celebration of the day of the Flemish community (juli 11). The party was held at castle Bouckenborgh. Because of environmental aspects, the mayor decided to skip the traditional fireworks and to look for other possibilities ,without fearful animals because of the loud popping, without air pollution, without fire hazard. We worked out a stylish laser spectacle, together with the municipal services. There were projections on the castle showing the emergence of the day of the Flemish community, the battle of the Golden Spurs,... folowed by animations on tidbits in Merksem.