Later in the second story arc and for the rest of the series, they become white.

Then the team leaders spread in an arc behind him.

We're going to have to push out and come around in a wide arc.

The young men run past him in arcs, calling out.

He led them in a wide arc around the principal road.

For a moment or two she swung in an arc below me.

Even as I looked, this machine began to bob and turned off in a slow arc.

She swept her hand in an arc at the sky.

His open hand rose in a short arc and chopped down, followed by the other.

First, it is not straight, but runs in a wide arc.