1. Get Key
2. Open Door
3. Go Inside
4. Close Door
5. Lock Door
6. Thank You
This is what the sign says (I helped with the spelling here):
"Happy St. Patrick's Day Leprechauns!"
Z decided to set the trap in the hallway downstairs because there was plenty of light there. He carefully lay the key next to the door and skipped away with excitement. In the morning he ran downstairs to check his trap and......