int main()
{
//颜色 color 粗细 size 速度 speed
// 直行 fd 后退 bk 左转 lt 右转 rt
pen.color(1);
pen.size(10);
pen.show();
pen.speed(5);
pen.fd(100);
pen.rt(120);
pen.fd(100);
pen.rt(120);
pen.fd(100);
pen.fd(100);
pen.rt(120);
pen.fd(100);
pen.rt(120);
pen.fd(100);
pen.fd(100);
pen.rt(120);
pen.fd(100);
pen.rt(120);
pen.fd(100);
return 0;
}