startup

while true do
  os.pullEvent("redstone")
  if rs.getBundledInput("front") == colors.white then
    turtle.select(1)
    turtle.digUp()
    while not turtle.up() do
      sleep(0.1)
    end
    while not turtle.up() do
      sleep(0.1)
    end
    turtle.select(2)
    turtle.place()
    local re = peripheral.wrap("front")
    re.pullIntoSlot("east",2,1,0)
    sleep(1)
    re.pushIntoSlot("east",0,1,2)
    turtle.dig()
    while not turtle.down() do
      sleep(0.1)
    end
    while not turtle.down() do
      sleep(0.1)
    end
    turtle.select(1)
    turtle.placeUp()
  end
end