Help Using Push Button With Pic16f883

void main(void) {
  
    TRISB7=0;
    TRISB6=0;
    TRISB5=0;
    PORTBbits.RB7=0;
    PORTBbits.RB6=0;
    PORTBbits.RB5=0;
    TRISA0=1;
    PORTAbits.RA0=0;
    ANSEL=0X00;
    ANSELH=0X00;
  
       while(1){
        
           if(PORTAbits.RA0==0){
           __delay_ms(70);
           if(PORTAbits.RA0==0){
                 RB5=1;
                 __delay_ms(500);
                 RB6=1;
                 __delay_ms(700);
                 RB7=1;
                 __delay_ms(500);
                 RB7=0;
                 __delay_ms(700);
                 RB6=0;
                 RB5=0;
                  while(PORTAbits.RA0==0);
            }
        }
       else{
           RB5=0;
           RB6=0;
           RB7=0;
        }
       }
}

// near start of the loop:
switch_pressed = switch_input_bit;
// or !switch_input_bit for an active low input

// That guarantees that an change to the input state is only registered
// at the start of the loop, and nothing can change during the loop body.


//The input state test
if(switch_pressed == true && switch_image == false) {
// New switch press, take appropriate action
....
}
else {
// switch not pressed, or already seen.

}

// Rest of code

// and just before the end of the main loop
switch_image = switch_pressed;