This is an 88-by-88-sized Costas array, mapped to notes on the piano, played using a structure called a Golomb ruler for the rhythm, which means the starting time of each pair of notes is distinct as well.
To macierz Costasa 88 na 88 przepisana na fortepian, i zrytmizowana za pomocą linijki Golomba, co oznacza, że czas zagrania każdej pary nut także jest różny.