Fro

We were running to and fro.

The lion walked to and fro in its cage all day.

Children were running to and fro in the park.

His eyes went to and fro.

He walked to and fro on the stage.

He walked to and fro in front of her house.

She was so nervous she paced to and fro in the waiting room.

She was walking to and fro, lost in thought.

It's a fiddle going to and fro between the keyboard and mouse so are there shortcuts to allow operation using only the keyboard?

I spent that day listening to the lonely scrapings of a pen. During that time, from time to time, I heard a Java sparrow twittering. It occurred to me that maybe Java sparrows twitter out of loneliness too. I walked out to the veranda to see. Nevertheless, flying to and fro between two perches busily and incessantly, it did not show the slightest hint of grievance.