The sample program demonstrates how to draw a solid square using the Pen blocks. In fact, the sample project draws four solid squares. Study the sample project carefully and understand it fully before attempting this assignment.

ASSIGNMENT:

The sample project creates a 4x2 checkerboard where there are four columns and two rows. You will create a 4x4 checkerboard. Your squares must be forty units wide and the center of the checkerboard must be at (0,0). Additionally, draw a red rectangle around the perimeter of your checkerboard.