How do you burn down the pillers on runescape

right click on the rag rip it in half and click on the oil can and on the half rag and do the same for the other then click on the rag and then click on the pillar same with the other click on a fuse click on a fuse then click on the pillar and again same for the other now click on a tinder box and right click on sir vant then click use tinder box -> sir vant go to the other pillar click on your tinder box and click on the pillar then RUN!!!

that will burn down the pillar :)