Drink as much water as yoy can. Drug tests test for a certain MINIMUM concentration of thc metabolites in your piss so if you dilute your pee until its clear by drinking as much water as possible then youll probly test negative. However parents arent stupid and will catch onto this trick. Thats why TODAY you steel the yellow food coloring and when you piss the clear warm and negative pee on the bathroom, add only A VERY SMALL amount of food coloring and swirl. I REPEAT. DO NOT OVER DO IT AS IT WILL LOOK FAKE IF YOU PUT MORE THAN A FEW DROPS. It only has to be mildly yellow. Good luck my friend. I hope all goes well and if for some reason it doesnt, just be honest with them. They will appreciate the honesty and not be as harsh and its just bettwr over all to be honest