local function getMat()

  right() ; robot.select(12) ; robot.place() ; robot.select(13)
      repeat
      for slot=1,27 do
        local stack_info = inventory.getStackInSlot(side, slot)
        if findMat(stack_info) then
          print("Low building materials", "Restocking from" ,slot)
          inventory.suckFromSlot(sides.front, slot)
      break
        end
      end

          if robot.count(13) <= 13 then
            until robot.(13) >= 13
robot.select(12) ; robot.swing()
  left()
end