1. tick on the underscore.
2. horizontal left to right.
3. left-right tick, then an underscore.
4. tick and start from top to bottom.
5. Central line, tick tick, then left to right.
6. the underlying concept and then tick the vertical lines.
7. underscore in drag from right to left, then tick downward from left to right.
8. a small child as underlying is the last sequence.