went back and forth

• oscillatedMoved rhythmically between positions
• waveredShowed unsteady resolve
• shuttledTransported on regular route
• ping-pongedBounced repeatedly between two
• vacillatedChanged mind repeatedly

seesawed · zigzagged · alternated · swayed · fluctuated · debated · argued · negotiated · deliberated · paced · traveled · commuted · swung · teetered · indecisive · pendulum · rhythm · restless