Help How do I get everybody out of the house?

[whiteboyswithars]

My plan is to lock myself into the garage and run all of the cars that my parents own (my dad collects old cars, so they emit a lot of CO) and let the gas take me. This isn't possible though if anybody is home since they would find me so quick. How do I get everyone out of the house to do this? I have tried so many methods and I just can't CTB. Any suggestions?