A YouTube channel MindYourDecisions posted a video about an interesting Chinese College Entrance exam question. The following is the screen of the problem posted by MindYourDecisions: Draw the graph of
Turtle unfortunately doesn’t provide function to draw an ellipse. An ellipse is a curve surrounding two focal points such that the sum of the distances to the two focal points
The bar in the middle seems to get darker from left to right. Actually, the bar as the same brightness. Write a Python Turtle program that draw this illusion called