arrow board canada colour conifer danger fire flammable forest indicator inflammable notice risk sign tree warning wood background Barrañan burn burning burnt carbonization carbonize carbonized coruna eu galicia oxidation Spain texture bright column columns head light lighting match matchbox matches phosphorus row rows Barrañan saavem arson box cigarette ignite Matchstick red sticks sulphur wooden barbecue bowl coal cook food grill heat myst roast smoke warm bonfire combustible combustion ember firewood flame fuel hell hot thermal timber