Program that draws a colorful rainbow using Turtle graphics in Python

This program first sets up the window and turtle, then defines a list of colors to use for the rainbow. It then draws seven circles of increasing size, each with a different color from the list. The turtle moves to the appropriate location for each circle using the goto method, and the pencolor and pensize methods are used to set the color and thickness of the turtle's pen. Finally, the program keeps the window open until the user closes it.
You can run this program in your Python environment or IDE to see the result.