startup.bak

while true do
  if redstone.getInput("right") then
    turtle.turnLeft()
--    for i=1,16 do
for i=1,1 do -- just use the first slot
      turtle.select(i)
      while turtle.suck() do
        turtle.dropDown()
      end
    end
    turtle.turnLeft()
    turtle.forward()
    turtle.turnRight()
    turtle.turnRight()
    turtle.forward()
  end
  turtle.digDown()
  turtle.placeUp()
  os.sleep(.5)
  print("rinse, repeat.")
end