Draw three filled circles in a vertical line.

Each circle has a radius of 25 units. Their centers are at x = 0:

Draw only the circles.

Three traffic light circles

Hint: Where should the turtle start?

The turtle faces right. With circle(25), the circle’s center is 25 units above the turtle. So, subtract 25 from each center’s y coordinate to find where the turtle should start. The x coordinate stays the same.

The turtle starts 25 units below the circle center