Experiment

In the basement spaces of Trojanova Street in Prague, there was once a mad scientist who locked himself in his laboratory for several years and worked on his research. The windows in the laboratory were so tightly closed that no one passing by could look inside. Sometimes there were sounds of loud explosions from the laboratory. One day the doors to the laboratory suddenly opened, but no one was inside. The laboratory stood empty for a long time and the instruments inside were covered in dust and rust. Spiders wove their webs under the ceiling and looked with their glowing eyes at the unclear tangle of wires. We have information that something very valuable was left behind in the laboratory by the scientist! Mysterious things continue to happen in the laboratory. Sometimes voices can be heard from it, sometimes the sound of clapping doors. Can you find what is hidden in the laboratory and escape alive?