Hayato Sumino, known professionally as Cateen, is a 25-year-old Japanese classical pianist. He shares his 7 variations on Twinkle Twinkle Little Star, each one increasing in virtuosity.

Level 0 is the nursery rhyme’s humble melody, and Level 1 has flourishes in the style of Mozart.

Level 2 adds lovely harmonies in the form of a lullaby, and Level 3 is in a ragtime style.

Levels 4 and 5 display virtuosic flourishes in the style of Liszt.

Level 6 is in the style of a Chopin étude, and Level 7 gains dizzying speeds and a rich tapestry of colours and dynamics.