sblink(int get) //Function definition with "get" as parameter  
{
  for (int i=0; i<=7 && RB0==0; i++) 
        {
       PORTD = get << i;  //LED move Left Sequence 
       __delay_ms(50);
        }
          for (int i=7; i>=0 && RB0==0; i--)
        {
       PORTD = get << i;  //LED move Left Sequence 
       __delay_ms(50);
        }      
}

/*******MAIN Function*******/
void main() //The main function
{
TRISB0=1; //Instruct the MCU that the PORTB pin 0 is used as input for button.
TRISD = 0x00; //Instruct the MCU that all pins are output 
PORTD=0x00; //Initialize all pins to 0
OPTION_REG= 0b00000000;//Enable pull up R on port B

while(1) //Get into the Infinite While loop
{
    
    if (RB0==0)
    {
    
        sblink(1); //FUNCTION CALL 1 with parameter 1 
        sblink(3); //FUNCTION CALL 3 with parameter 3
        sblink(7); //FUNCTION CALL 7 with parameter 7
        sblink(15); //FUNCTION CALL 4 with parameter 15
        
        while(RB0==0) //If button is still pressed
        {
            PORTD=0xFF; //Turn ON all LEDs
        }
    }
   
}
}