Rez it on the ground and the particle effect will start.
Type "/66change" and a menu will drop down allowing you to choose 12 types, 12 colors, 3 sizes or turn the particles off.
Caution: If you choose "finalize" in dialog box then the type, color and size is fixed. (even if you type "/66change", dialog box won't drop down)
You can also use voice commands on channel 66, as follows:
/66 on_off /66 finalize /66 default /66 1 /66 2 /66 3 /66 4 /66 5 /66 6 /66 7 /66 8 /66 small /66 medium /66 big /66 white /66 gray /66 black /66 blue /66 red /66 green /66 yellow /66 pink /66 cyan /66 magenta /66 lavender /66 rainbow
Texture: /66 texture UUID - UUID is the UUID of the texture you want to use. To obtain that key, find the texture you want to use in your inventory, right click it, and choose 'Copy Asset UUID', and then ctrl+v, it'll get you the desired key. The command will look like this: '/66 texture c6dbc4b2-918c-b224-8f8d-210b9a07fabf' If you choose "default" in dialog menu, it will revert to the default texture.