/particle note -1817 62 157 5 5 5 .01 1 force

/particle endRod -1817 76 159 0 1 0 .5 10 force

Explanation

How to make Christmas trees

This small command modification allows you to add different particles on your Christmas tree. For more Christmas lights, here's another tutorial done by me.

 ▶ [Set on 'repeat' and 'always active'] The first command (the one at the bottom) is a /particle command that generates note particles. Of course in your world you'll have to change the coordinates where you want the particles to be generated. The first 3 numbers (/particle note -1817 62 157 5 5 5 .01 1 force) indicate the X, Y and Z coordinates.

The three 5 following the coordinates indicate for how many blocks the particles have to expand. In my case, the particles will expand by 5 blocks in every direction from the point specified with the coordinates.

Every time we add 'force' at the end of a /particle command, we are specifying that the particles can be viewed from any direction and by every player.

 ▶ [Set on 'chain', and 'always active'] The second command does the exactly same thing. It only uses different particles: endRod particles which look really close to snow.