go green
turn green

The light turned green and the car moved ahead again.

I thought about the likely treatment and nearly turned green.

But he had just found the right page when the light turned green.

With an effort of will, he made himself turn green again.

She almost looked to see whether the sun had turned green!

The light turned green, and we continued on our way.

When the light began to turn green I knew that night was coming.

Now the spot, a park in the 19th century, may turn green again.

How long would it actually take for something that big to turn green?

You're not going to suddenly turn green and walk about like that you know.