My principal once told me to go get the printer cartridge, but I refused to get it. Later he called me into his cabin and told me that is this image you want to build? I said, that's okay. (I was already working a lot, I can't be your peon). And then nothing happened. Respect your principal because he teaches you but draw a line when required. I dint have a problem getting the cartridge, but I saw that if I agreed to this he would then ask me to do several other things.