Kane84. Welcome to the MacRumors Forums. May your time here be fruitful, enjoyable, and praise worthy. Don't listen to the guys above. It wouldn't be 10,000 different code combinations, yet rather 9,999- so at least you've got that going for you.
It would help too if you stated the color of your 5C as the white and blue ones are easier to 'crack' than the yellow and pink ones.