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

There is A Fountain

William Cowper Gospel

There is A Fountain - William Cowper

do mi sol la sol DO DO la sol do mi sol sol la sol mi do re
do mi sol la sol DO DO la sol DO RE MI DO RE MI DO
DO RE MI DO RE MI DO la DO la sol sol la sol mi do re
do mi sol la sol DO DO la sol DO RE MI DO RE MI DO