It is unlawful for any person, firm or corporation depositing or maintaining, or causing to be deposited or maintained any building material of any kind whatsoever, or any such debris in any public street, alley or other public place, to fail, refuse or neglect to display and maintain a red light at each end of each pile of such material or debris during the whole of each night from one hour before sunset until one hour before sunrise. (Prior code § 12.20.040)