How to play this song ?

These are single notes, not chords.
Each note must be played individually.

There are different notations, like, A B C , DO RE MI , Sa Re Ga and numeric notation 1 2 3.
Choose one that fits better for you.

You can distinguish the octave by the color of the note and if it is UPPERCASE (high pitch) or lowercase (low pitch). Enjoy

Flashlight

Jessie J Pop

"Flashlight" is a song originally performed and composed by Jessie J. The song was released in 2015 and featured on the soundtrack for the movie "Pitch Perfect 2." It was written by Sia, Sam Smith, Christian Guzman, and Jason Moore. Notably, Sia initially intended to include the song on one of her own albums, but ultimately decided to offer it to Jessie J. "Flashlight" became a commercial success, reaching the top 10 in several countries. The song showcases Jessie J's powerful vocals and emotional delivery, combined with a catchy pop melody.