8*8 点阵

请教：显示的数字为何逆时针转了90度？
程序代码：
#include<reg52.h>
unsigned char code shu2[]={0x0,0x3C,0x4,0x8,0x10,0x20,0x3C,0x0};
unsigned char code lie[]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};
void main()
{ unsigned char i,a;
a=100;
for(i=0;i<8;i++)
{
P0=shu2;
P2=lie;
while(a--);
}

}