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

Hello

OMFG Games

"Hello" is a popular electronic dance music track by OMFG. The song is composed and performed by OMFG, which is actually a musical project by American producer and DJ, Alexis Marsh. "Hello" was released as a single in 2014 and gained widespread popularity online. The track is known for its catchy melody and energetic beats, which have made it a favorite among EDM enthusiasts. The original key of the song is D# major. Interestingly, "Hello" was often used as background music in various YouTube videos and became a meme in the online gaming community.