Sulfur cube display

BEST OBSERVED WITH VIBRANT VISUALS
NOT MEANT TO BE SURVIVAL FREINDLY, JUST A CONCEPT.
I made a display using sulfur cubes.
bottom is selector, push around a sulfur cube to use. lights indicate which trapdoors will be flipped.
to the right of the screen tells you how far down, the other tells you which column.
to run:
  push the sulfur cube on the floor until you have it where you want it.
  press button located at -13 4 0.
    this will cause a sulfur cube out of the queue to come out at -14 1 0.
  put a block in and scoop up with a bucket. (apparently dispensers can't pick them up)
    place this in chest at 3 2 18
  flick lever at 3 4 17 and wait for sulfur cube to fall into place.
  unflick lever at 3 4 17.
  repeat until satisfied with placements
  splash with invisibility (or run /effect @e[​tag=!dont] invisibility [​duration] 1 true) the tag part is to not get the selector and will get sulfur cubes in queue and in growth chamber