Notes on a keyboard for Deck the Halls?

Deck the Halls is in G Major. The notes are G, A, B, C, D, E, F#, and G.

The opening notes are G - A - G - D. The melody continues with G B C C-D-E, F#-G, G-A, G-D, G B C B-A-G C-D-E, F# G G.

F#-G, G-A, G-E-D-C, B C-D, E-F#-G, G B C B-A-G C-D-E.

F#-G, G-A, G-D, G-A-G-D.