#define DDRF (*(volatile char*)0x30)
#define PORTF (*(volatile char*)0x31)
#define x 500000
int main(){
  volatile long i;
  DDRF =255;
  while(1){
    PORTF = 191; //0
    for(i=0;i<x;i++){}
    PORTF = 134; //1
    for(i=0;i<x;i++){}
    PORTF = 219; //2
    for(i=0;i<x;i++){}
    PORTF = 207; //3
    for(i=0;i<x;i++){}
    PORTF = 230; //4
    for(i=0;i<x;i++){}
    PORTF = 237; //5
    for(i=0;i<x;i++){}
    PORTF = 253; //6
    for(i=0;i<x;i++){}
    PORTF = 135; //7
    for(i=0;i<x;i++){}
    PORTF = 255; //8
    for(i=0;i<x;i++){}
    PORTF = 239; //9
    for(i=0;i<x;i++){}
    PORTF = 255; //8
    for(i=0;i<x;i++){}
    PORTF = 135; //7
    for(i=0;i<x;i++){}
    PORTF = 253; //6
    for(i=0;i<x;i++){}
    PORTF = 237; //5
    for(i=0;i<x;i++){}
    PORTF = 230; //4
    for(i=0;i<x;i++){}
    PORTF = 207; //3
    for(i=0;i<x;i++){}
    PORTF = 219; //2
    for(i=0;i<x;i++){}
    PORTF = 134; //1
    for(i=0;i<x;i++){}
    }

  }