Gray Rectangles
There is one colored rectangle in each window, and possibly many gray rectangles.
- Clicking moves the center of the colored rectangle to the mouse.
- Hitting the space bar projects the shadow of the colored rectangle from the current window to gray rectangles in the other windows. (Same center, width, and height; different color.)
- The shadow does not move when you click to move the colored rectangle.
- Hitting space a second time replaces the old shadow of the colored rectangle with a new one.
Understanding
There are check-expects for all of the behavior described above.
Showing mastery (grade of A): add a modification to the code: hitting
“d” or backspace ("\b") removes the shadows of the current world’s
rectangle.
Demonstrations
There is a screen shot and a video link below.
