This apparent randomness was actually planned to an extremely high degree; it was also exceptionally high-tech and typically Dutch. The substrate consisted of different layers of red mine-stone and black sediment. On it, planting squares were indicated with four different plant densities. At spots where visitors walked particularly frequently, the small black slit in the coarser red mine stone disappeared, and planting became less likely. Elsewhere, the flora became thicker. The 20 different species of plant had different colours and flowering times. An extensive network of pipes for drip irrigation ensured that a process that normally takes five years would attain completion within a year. Platforms, partitions and other elements made of non-living material, which can indicate a specific use, were consciously avoided. Nevertheless, one compromise was unavoidable: in order to somewhat streamline the expected millions of visitors, a winding route towards the entrance was designed. Through – preplanned – chance and randomness, the garden changed, like a gobstopper, from day to day, providing a continuously changing context for the Dutch pavilion.