int counter, step, debounce, effect = 0;

char leds [2][10] = {
     {0x65, 0x9A, 0xA9, 0x56, 0xD1, 0x2E, 0xD1, 0x56, 0xA9, 0x9A},
     {0x4, 0x1A, 0x8, 0x16, 0x10, 0xE, 0x20, 0xC1, 0x40, 0xA1}
     };

void Interrupt(){
  if (TMR0IF_bit){
    TMR0IF_bit = 0;
    TMR0 = 6;
    counter++;
    debounce++;
  }
}

void main(){
  while(1) {//main loop

    if(counter == 100){
    counter = 0;
    PORTB = leds[effect][step++];
    if(step == 10){
    step = 0;
      }
    }
   
    if(!RA6_bit){
      debounce = 0;
      while(debounce != 100);
      effect++;
    }

  } //end of main loop
}

#define DEBOUNCE_LIMIT ((unsigned int)6)
#define COUNTER_PERIOD ((unsigned int)6)
#define EFFECTS_NUM (2)
#define STEPS_NUM (10)

#define MOD(x) ((((signed int)(x)) >= 0) ? (unsigned int)(x):(unsigned int)((unsigned int)0 - (unsigned int)(x)))

volatile unsigned int counter, debounce, effect = 0;
unsigned int step  = 0;

char leds [EFFECTS_NUM][STEPS_NUM] = {
{0x65, 0x9A, 0xA9, 0x56, 0xD1, 0x2E, 0xD1, 0x56, 0xA9, 0x9A},
{0x04, 0x1A, 0x08, 0x16, 0x10, 0x0E, 0x20, 0xC1, 0x40, 0xA1}
};

void leds_step();
void next_effect();

void Interrupt(){
    if(TMR0IF_bit){
        TMR0IF_bit = 0;
        TMR0 = 100;

        counter++;

        if(!RA6_bit){
            if(debounce < DEBOUNCE_LIMIT){
                debounce++;
            }
        }
        else{
            if(0 < debounce){
                debounce--;
            }
        }
    }
}

void leds_step()
{
    PORTB = leds[effect][step++];
    if(STEPS_NUM == step){
        step = 0;
    }
}

void next_effect()
{
   if(effect < (EFFECTS_NUM - 1)){
      effect++;
   }
   else{
      effect = 0;
   }
}

void main(){

    unsigned char is_btn_pressed = 1;
    unsigned int counter_prev = counter;

    while(1)
    {
        if(COUNTER_PERIOD <= MOD(counter - counter_prev)){
            counter_prev += COUNTER_PERIOD;
            leds_step();
        }

        if(DEBOUNCE_LIMIT == debounce){
           if(!is_btn_pressed){
              is_btn_pressed = 1;

              next_effect();
           }
        }
        else if(0 == debounce){
           is_btn_pressed = 0;
        }
    }
}

if(step == 10)
    step = 0;

    if(step == maxstep){
    step = 0;

int counter, step, effect = 0, maxstep = 10;
unsigned push = 0;

char leds [3][12] =
     {
     {0x00},
     {0x65, 0x9A, 0xA9, 0x56, 0xD1, 0x2E, 0xD1, 0x56, 0xA9, 0x9A},
     {0x4, 0x1A, 0x8, 0x16, 0x10, 0xE, 0x20, 0xC1, 0x40, 0xA1, 0x80, 0x61}
     };

void Interrupt(){
  if (TMR0IF_bit){
    TMR0IF_bit = 0;
    TMR0 = 6;
    counter++;
  }
}

void main(){
TRISB = 0;
TRISA = 1;
PORTB = 0;

OPTION_REG = 0x81;
TMR0 = 6;
INTCON = 0xA0;

  while(1){

    if(counter == 100){
    counter = 0;
    PORTB = leds[effect][step++];
    if(step == maxstep){
    step = 0;

    if(push == 1){
       push = 0;
       PORTB = 0x00;
       switch(effect){
         case 0 : effect = 1; maxstep = 10; break;
         case 1 : effect = 2; maxstep = 12; break;
         case 2 : effect = 0; break;
       }
    }
    }

    if(!RA6_bit){
    push = 1;
      }
    }
  }
}