Draw Conventional symbols in building
1. Door: A rectangle with a smaller rectangle inside representing a door handle.
2. Window: A square or rectangle with lines inside to represent panes of glass.
3. Stairs: A series of diagonal lines with small horizontal lines across to indicate steps.
4. Wall: A solid line to represent the outline of a wall.
5. Elevator: A rectangle with small horizontal lines inside to indicate the elevator cabin.
6. Restroom: A rectangle with a smaller rectangle inside representing a toilet or a sink.
7. Fire alarm: A square with a triangle inside to represent a fire alarm bell.
8. Fire extinguisher: A rectangle with a small circle inside to indicate a fire extinguisher.
9. Exit sign: A rectangle with the word "EXIT" written inside.
10. Emergency exit: A rectangle with a door symbol inside and an arrow pointing downward.