#define        is        ==
#define        sw1      porta.B3
#define        sw2      porta.B4
#define        preseed  0
 char x=0;
void init()
{
 cmcon=7;
 trisa=0b00011000;
 porta=0;
 trisb=0;
 portb=0;
}

void main()
{
 init();
 portb=0;
 porta=0;
 while(1)
 {
   if(sw1 is preseed ){
                       delay_ms(10);
                       while(sw1 is preseed);
                       delay_ms(10);
                       x++;
                       if(x is 13 ) x=1;
                      }
 
  if(sw2 is preseed){
                    delay_ms(10);
                    while(sw2 is preseed);
                    delay_ms(10);
                    x--;
                    if(x is 0)x=12;
                   }
 if(x is 1){porta=0;portb=1;}
 if(x is 2){porta=0;portb=2;}
 if(x is 3){porta=0;portb=4;}
 if(x is 4){porta=0;portb=8;}
 if(x is 5){porta=0;portb=16;}
 if(x is 6){porta=0;portb=32;}
 if(x is 7){porta=0;portb=64;}
 if(x is 8){porta=0;portb=128;}
 if(x is 9){porta=1;portb=0;}
 if(x is 10){porta=2;portb=0;}
 if(x is 11){porta=4;portb=0;}
 if(x is 12){porta=64;portb=0;}



}


}