The spot turned a softer blue, widening to cover the whole bed.

A large red spot under his eye was slowly turning into a bruise.

But they were trained to watch a computer screen and let go of a lever when a spot turned from red to green.

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

As they watched, the spot turned purple, and green again.

Move it up and down, until you see a spot in the twigs turn bright.

These spots turn pale when pressure is applied and eventually become raised on the skin.

She never noticed when the red spot on the door turned white and burned through.

If the spot turns blue, the drink has been dosed.

The bald spot on the back of his head turned red.