要创建person类，单击工具面板上的Class图标，并在设计界面中画一个方框。
To create the Person class, click on the class icon in the tool palette and draw a box on the design surface.
画一个小发言人图标的形状。它旁边，创造出一个新月形状由两个重叠的循环。加证明层风格，类似于以前的按钮。
Draw a small speaker icon shape. Next to it, create a crescent shape made of two overlapping circle. Add following layer styles, similar to previous buttons.
画一个简略的草图标示车辆当时所在的位置往往很有用。
It often helps to make a rough sketch showing where the vehicles were.
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