STICKLINE(a-b 0,a-b,0,0.8,0),COLORMAGENTA; STICKLINE(a-b 0,a-b,0,0.8,0),COLORGREEN; partline(a-b 0,a-b),COLORMAGENTA,linethick2; partline(a-b 0,a-b),COLORGREEN,linethick2;