boil some kool aid then dip your hair in it. it's temporary but if you have dark hair you might need to bleach your hair. the dye is temporary ut the bleaching is not. good luck! if you have dark hair and don't want to bleach it, you can buy temporary dye.
You don't. Not that there aren't plenty of tutorials, but it doesn't actually work. It just makes a sticky mess because it's just sugar with food coloring and food coloring is just sugar, too. It doesn't penetrate your hair, but sits on top until it touches something else. You need to buy either Punky Color or Manic Panic and bleach your hair first with special hair bleach, not clorox!