if(a2 == 7 || a3 == 7){\r
cdDrawCurve(x1, y1, x2, y2, (x2 + x3) / 2, (y2 + y3) / 2, a2, 17);\r
cdDrawCurve((x2 + x3) / 2, (y2 + y3) / 2, x3, y3, x4, y4, 17, 15);\r
if(a2 == 7 || a3 == 7){\r
cdDrawCurve(x1, y1, x2, y2, (x2 + x3) / 2, (y2 + y3) / 2, a2, 17);\r
cdDrawCurve((x2 + x3) / 2, (y2 + y3) / 2, x3, y3, x4, y4, 17, 15);\r