first you line up five( or less) particles like this ..... then you type in the console "!set x all 300" and if you want a particle to have a special proporty you type that in too! (example: !set x all 300 *enter* !set ctype ice sing *enter* !set tmp ice 99999999999) then you save it as a stamp, and make a 3x3 square of it with the arrow keys, rinse, and repeat(order of square dimensions:3x3,9x9,27x27...)
how do you make these? @TheScienceKid
btw, im still working on more