private void match()
    {
        if (value = firstPicked)
        {
            firstPicked = returnValue
            flipCard();
        }
        else (value = secondPicked)
        {
            secondPicked = returnValue
            flipCard();
        }
    }

public Card(int val)

    {

        value= val;

        front = new GreenfootImage("g"+ val +".gif");

        setImage(back);

    }

private void match()
    {
        if (firstPicked & secondPicked.getValue())
        {
            flipCard();
             
        }
        else 
        {
            
        }
    }