void Piece(bool Red, int i, int j)
//Draws a red or white piece (cone+sphere) at the origin
{
    Material(Red);
    glPushMatrix();
    glTranslatef(i+.5,j+.5,0); // move to the center of the square
    glScalef(0.5,0.5,0.5);

    glutSolidCone(0.4, 2, 40, 40);
    glTranslatef(0,0,2); // lift for the position of the sphere on the top
    glutSolidSphere(0.4, 40, 40);

    glPopMatrix();
}