YellowSpace.java
package shapes;

public class YellowSpace {

    public static void main(String[] args) {


    SSquare largeGreySquare = new SSquare(400);
    SSquare largeYellowDiamond = new SSquare(197.99);
    SSquare smallGreySquare = new SSquare(97.57);
    SSquare smallYellowDiamond = new SSquare(47.78);

    double yellowArea = largeYellowDiamond.area() - smallGreySquare.area()
            + smallYellowDiamond.area();
    System.out.println("Yellow area =  " +yellowArea);
}
}