unsigned long int x=0;
void main()
 {trisa=1;trisb=0;portb=0;
 cmcon=7;
 while(1)
         {
         if(porta.f0==1)
                          {
                          x=0; 
                           while(porta.f0==1)
                           {
                            delay_ms(1);
                            x++;
                          }
          }
         if(x<=1000 )portb=0;
         else if(x<=2000)portb=1;
         else if(x<=3000)portb=2;
         else if(x<=4000)portb=4;
         else if(x<=5000)portb=8;
         else if(x<=6000)portb=16;
         else if(x<=7000)portb=32;
         else if(x<=8000)portb=64;
         else portb=128;

         }

}

{
                          x=0; 
                           while(porta.f0==1)
                           {
                            delay_ms(1);
                            x++;
                          }