ha ha! (sorry). i did this myself once, so i know how painful the results are. you now have two choices: more peroxide (and risk wrecking your hair at the roots) or a trip to the salon, where your only option is to go back to your original colour (the safest dye option by far). i chose the former (well, i was only 15!) and ended up shaving all my hair off in a fit of temper after a four day bad hair day. learn your lesson and never, ever attempt to dye your hair a much different colour than your natural shade at home. it only ends in tears - for gods sake go to a salon!!!!!! x