Click the green flag and play around with the sliders.
Drawing an ellipse using line segments of equal length is surprisingly difficult. Here, I accomplish equal distance between the dots by first drawing an invisible ellipse, and calculate the distance moved - in other words the circumference*. Then I draw a dot every time the pen has moved a distance equal to the circumference divided by the number of dots. * Calculating the circumference of an ellipse is more difficult than one might think. In practice, the best you can do is an approximation. Luckily, an ellipse drawn in Scratch is not a true ellipse, but a polygon that approximates an ellipse, and the sides of that polygon are easily measured. Read about calculating the circumference of ellipses here: https://www.mathsisfun.com/geometry/ellipse-perimeter.html Thanks to @ArnoHu and @Scratch-Minion for their helpful advice.