Turtle sort copper

function d3()
  turtle.turnRight()
  turtle.drop()
  turtle.turnLeft()
end

function d30()
  turtle.drop(30)
end

function d39()
  d30()
  turtle.turnLeft()
  turtle.drop(9)
  turtle.turnRight()
end

function items()
return turtle.getItemCount(1)
end

while true do
  if items() => 30 then
    sleep(10)
    if items() > 30 then
      if items() == 33
        d30()
        d3()
      elseif items() == 39
        d39()
      elseif items() == 42
        d39()
        d3()
      end
    else
      turtle.drop()
    end
  elseif items() == 0 then
    sleep(15)
  else
    sleep(5)
  end
end