说明：  VB绘制肾形图案源代码，肾形图案说不上是规则还是不规则，呈线性特点吧。初始化绘图环境将Picture1定制成一个中心点坐标为(0,0)的坐标系。
(VB source code to draw the kidney-shaped pattern, kidney-shaped or irregular pattern can not be considered the rule, linear features it. Initialization drawing environment will Picture1 customized to a central point with coordinates (0,0) coordinate system.)