Design and implement a single program:

• to produce a simple graphical representation of a set of squares, as shown in Figure 2 (below). The output should consist of 4 squares with sides of length 20, 40, 60 and 80 respectively, arranged in a diagonal as shown.
• that, in principle, can produce larger numbers of squares simply by changing one number that specifies the number of squares.
• with the turtle starting at the bottom left-hand corner of the bottom square and pointing to the right.
• a.Produce a top-level decomposition, making use ofexactly one loop. At this stage express your answer in terms of two sub-problems.
• b.Refine your decomposition to give an algorithm, as you include extra detailmake use of a second loop.
• c.Translate your algorithm into Python, including appropriate comments, and run your program to ensure the output matches Figure 2. You do not need to submit an output.