How to pull an all nighter without my parents knowing?

Okay here goes... I'm 15, I stay with my mom and 2 brothers at my grandparent's house. I share a room with my 20 year old brother (he is a hard sleeper)... My mom is next door in the other room with my 13 year old brother. My mom gets up once or twice to check on us. How can I pull an all-nighter without getting caught by my mom?