void main(){
// variables
int x[5]={63, 6, 91, 79, 102};
int i = 0 , flag = 0;
trisa = 0; trisb = 0; trisc = 0; trisd = 0; trise = 1;
porta = 0; portb = 0; portc = 0; portd = 0; porte = 0;
adcon1=6;
PWM1_Init(500); //initialise PWM1 at 5KHz
portb = x[0];

while(1) { // start infinit loop
  if (porte.f0 == 1) flag = 1;
  if(porte.f0 == 0  && flag == 1)  // if the push button is pushed
    {
     i++;
     portb = x[i]+0x80;   // indicator led according to motor speed
                         //signal to motor forward direction
     PWM1_Start(); //start PWM1
     PWM1_Set_Duty(i*255/4); // set duty cycle from 25% to 100%
     flag=0;

    }
  if (i == 5)
   {
    i = 0 ;
    portb =x[0];
    PWM1_Stop();
   }

} //end loop
} //end main