Hello this is python 3.7 I am teaching myself

And need help . Please explain how the code works thanks

3.3.12. Write a function drawRow (tortoise, colorl, color2) that draws one row of an 8 x 8 checkerboard in which the colors of the squares alternate between colori and color2. The parameters colori and color2 are both strings representing colors. For example, calling dravRow (george, 'red', 'black') should draw a row that alternates between red and black. 3.3.13. Write a function checkerBoard(tortoise) that draws an 8 x8 red/black checkerboard, using a for loop and the function you wrote in Exercise 3.3.12. 3.3.14. Interesting flower-like shapes can also be drawn by repeatedly drawing polygons that are rotated some number of degrees each time. Write a new function polyFlower (tortoise, sideLength, numSidos, numPolygons) that calls the dravPolygon function from Exercise 3.3.7 to draw an interesting flower design. The function will repeatedly call dravPolygon a number of times equal to the parameter numPolygons, rotating the turtle each time to make a flower pattern. You will need to figure out the rotation angle based on the number of polygons drawn. For example, the following was drawn by calling dravFlover (george, 40, 12, 7)