CraftKnifes

local input = peripheral.wrap("left")
local output = peripheral.wrap("bottom")

function craftAndPush()
  input.pushItems("front", 1, 1)
  turtle.suck(1)
  turtle.transferTo(6, 1)
  input.pushItems("front", 2, 1)
  turtle.suck(1)
  turtle.craft()
  turtle.dropDown()
end

while true do
  local inputList = input.list()
  if(#inputList < 2) then
    os.exit()
  end

  local outputItem = output.getItemDetail(1)
  if(outputItem == nil) then
    craftAndPush()
  end

  os.sleep(2)
end