The document provides step-by-step instructions for performing CPR and using an AED to restore breathing in an unconscious victim. It details how to check for dangers, assess consciousness, perform chest compressions and rescue breaths in a cycle, use an AED if available, and continue CPR until emergency help arrives or signs of life return. Key steps include performing 30 chest compressions at 103 bpm, giving 2 rescue breaths if trained, using an AED as soon as possible, and resuming CPR after its shocks until the victim revives or more help takes over.