In a second series of readings we have two coordinated clauses, the children executing two consecutive actions instead of one.
Series II
—He opened the door and came in.
—He left the room and locked the door behind him.
—He went on tiptoe to the door and carefully opened it.
—She covered her face with her hands and began to sob violently.
—She gave a cry of joy and ran to the door.
—She burst into a laugh and clapped her hands.
—He took off his cap and made a low bow.
—She shook her head sadly and smiled.
—He threw the window wide open and looked into the garden.
—He hurried to the table and rang the bell.
—With a sigh of relief he stretched himself out on the sofa, and lay there looking at the ceiling with his mouth open.
—He shut his eyes and fell asleep.
In the third series, there are sentences with one or more coordinate clauses.
Series III
—She opened the door, smoothed her hair slowly and came in.
—He went to the window, opened it a little and peered into the street.
—He closed the window, went back to his desk and then began to walk hurriedly up and down the room.
—The doctor bent over the sick man, felt his pulse with one hand and placed the other on his forehead.