What is written in yellow on red paper?

The words written in red paper and yellow letters are the words for exorcising the town demon. In geomantic omen, yellow represents earth, red represents fire, and the scarlet letter on the yellow background represents Buddha, which can represent Buddha in the house. Regular spells are painted by Taoist priests, spells are painted on red paper, and spells are painted on yellow paper. Yellow paper is a special paper for exorcising evil spirits, because yellow represents the sun and is lethal to evil spirits. This answer is for reference only. Don't be blindly superstitious.