#define uchar unsigned char
#define uint unsigned int

sbit LED=P3^6;
//delay for 1ms
void delay1ms(uint t)
{
uint i;
uchar j;
for(i=0;i for(j=0;j<120;j++);
}

//main
void main()
{
uint m,n;
LED=0;
for(m=0;m<256;m++)
{
P0=m;
delay1ms(300);
}
P0=0xff;
for(n=0;n<256;n++)
{
P0=n;
delay1ms(300);
}
while(1)
{
P0=0xf0;
P1=0x0f;
delay1ms(500);
P0=0x0f;
P1=0xf0;
}
}