Stage Wither Mats for AE Formation Planes

-- Basic computer, chest to right, second chest below that.
-- load top chest with witherheads and soul sand
-- import bus on second chest will import 4 sand and 3 heads every ~3
-- seconds, the ae update will trigger formation planes to place
-- wither parts and construct a wither.
-- Note: it's assumed this is at the top of a wither killing
-- structure (using draconic grinder or equivalent)

chest = peripheral.wrap("right")
chest.condenseItems()

local ok=2

while ok==2 do
ok=0

for i=1,27 do
  if chest.getStackInSlot(i)~=nil and ok==0 then
    local slot = chest.getStackInSlot(i)
    print(slot.name.." is in slot "..i)
    if slot.name=="soul_sand" then
      print("Pushing soul sand down from "..i)
      chest.pushItem("down",i,4)
      ok=1
    end
--  else
--    print ("slot "..i.." is empty.")
  end
end

sleep(1)

for i=1,27 do
  if chest.getStackInSlot(i)~=nil and ok==1 then
    local slot = chest.getStackInSlot(i)
    print(slot.name.." is in slot "..i)
    if slot.name=="skull" then
      print("Pushing skull down from "..i)
      chest.pushItem("down",i,3)
      ok=2
    end
  end
end

sleep(3)
end