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Jan. 12 (UPI) — An Arizona “Star Wars” fan is going viral after performing songs from the films using an unusual musical medium — a pencil, paper and math equation.

Dani Ochoa posted a video to YouTube showing her using a pencil to write a math equation on a sheet of paper, but her pencil strokes are timed and weighted to create the music for the “Cantina Theme” from Star Wars.

Ochoa, who described herself as “a girl with too much time on her hands,” said it took “way too much time” to teach herself how to make pencil music.

Ochoa followed-up the video by creating one of the series’ most iconic pieces of music, “The Imperial March,” with a similar method.