wither

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