delay = 1
numItems = 32

while true do
 print("waiting")
 os.pullEvent("redstone")
 print(redstone.getInput("back"))
 if redstone.getInput("back") then
  while redstone.getInput("back") do
   redstone.setOutput("front",true)
   sleep(delay)
   turtle.drop(1)
   redstone.setOutput("front",false)
   sleep(.1)
  end
 end
 if redstone.getInput("back") == false then
  redstone.setOutput("front",false)
  while turtle.getItemCount() ~= numItems do
   turtle.suck()
  end
 end
end