Amazing Sand Art Machine: A Sign in Space

A Sign in Space, an amazing sand art, made by Swedish artist Gunilla Klingberg, at Laga Beach in Spain. A Sign in Space, sand-print at Laga beach, Sense & Sustainability, Art Biennale, Urdaibai, Spain.
A graphic star-pattern composed of truck tires is printed as a relief on the sand at Laga beach during low tide. At high tide, the pattern will slowly vanish as the tide rises.
The printed pattern is made with a mechanical device, a manufactured steel-cylinder, with the graphic pattern as a matrix relief made of truck tires. The cylinder is connected to the beach cleaner tractor which drives from side to side of the beach in the morning,