ATTiny13a use button to toggle between voids

hey,

I am using an ATTiny13a to do some light effects with LEDs.
the different effects are placed in several voids. so the first void for the knightrider effect, the second for another flashing effect and a third for a random lighting effect.
the voids are placed in the loop part so that they executed one after the other.
Now instead of this scheme I want to use a push-button at PB0 to stwicht between the effects.
I have connected it like this:
one side: 4,7k resistor to 5V and 5V also to PB0
other side: to ground
I want to achieve the goal, that if you press the button, it goes to the next effect.
Now, I have no success to do this in my code.
Have anyone any examples for an attiny13a for this kind of scenario?

thanks a lot.

What code do you have so far? And schematic?
PB5 is reset which makes this a bit complicated.

Sorry, I did tell the wrong pin. I am using PB0.
Here is the complete code:

// Charlieplexing 12 LEDs with an Attiny13
// A N Peck May 2020

const int buttonPin = PB0;     // the number of the pushbutton pin
const byte looper = 5;         // how many times for each effect?
const byte betweenies = 1000;  // delay time between effects
uint16_t myrand = 2901;        // initial value for random seed
int buttoncount = 0;         // variable for reading the pushbutton status

// the LEDs port direction and portstate 12 x 2 array
const byte leds12 [12][2] =

{
  {0b00000110, 0b00000010}, // LED a
  {0b00000110, 0b00000100}, // LED b
  {0b00001100, 0b00000100}, // LED c
  {0b00001100, 0b00001000}, // LED d
  {0b00011000, 0b00001000}, // LED e
  {0b00011000, 0b00010000}, // LED f
  {0b00001010, 0b00000010}, // LED g
  {0b00001010, 0b00001000}, // LED h
  {0b00010100, 0b00000100}, // LED i
  {0b00010100, 0b00010000}, // LED j
  {0b00010010, 0b00000010}, // LED k
  {0b00010010, 0b00010000}, // LED l
};

// take the port direction, port state and delay to make the LEDs light up
void lightemup (byte portdirection, byte portstate, int mydelay) {
  DDRB = portdirection;
  PORTB = portstate;
  delay(mydelay);
}

// a little bit of zero led activity if needed
void deadled (int howlongdead) {
  lightemup(0b00000000, 0b00000000, howlongdead);
}

void setup() {
  pinMode(buttonPin, INPUT);
  attachInterrupt(buttonPin, Button, CHANGE);   // Hier findet die Einbindung unseres Interrupt-Befehls statt
  // a memory blowout in the next two lines to initialise random number
  pinMode(PB1, INPUT);
  myrand = analogRead(PB1);
}

// linear feedback shift register "randomiser"
uint16_t gimmerand(uint16_t small, uint16_t big) {
  myrand ^= (myrand << 13);
  myrand ^= (myrand >> 9);
  myrand ^= (myrand << 7);
  return abs(myrand) % 23 * (big - small) / 23 + small;
}

// random light effect
void randomleds() {
  for (byte theloops = 0; theloops < 100; theloops++) {
    byte thislight = gimmerand(0, 12);
    lightemup(leds12[thislight][0], leds12[thislight][1], 50);

    deadled(50);
  }
}

// moving single led backwards and forwards
void cylons() {
  for (byte theloops = 0; theloops < looper; theloops++) {
    for (byte outercount = 0; outercount < 12; outercount++) {
      lightemup(leds12[outercount][0], leds12[outercount][1], 200);
      deadled(25);
    }
    for (byte outercount = 10; outercount > 0; outercount--) {
      lightemup(leds12[outercount][0], leds12[outercount][1], 200);
      deadled(25);
    }
  }
  lightemup(leds12[0][0], leds12[0][1], 200);
  deadled(25);
}

// moving two leds backwards and forwards together
void twobytwo() {
  for (byte theloops = 0; theloops < looper; theloops++) {
    for (byte outercount = 0; outercount < 10; outercount++) {
      for (byte innercount = 0; innercount < 40; innercount++) {
        lightemup(leds12[outercount][0], leds12[outercount][1], 1);
        lightemup(leds12[outercount + 2][0], leds12[outercount + 2][1], 1);
      }
    }
    for (byte outercount = 8; outercount > 1; outercount--) {
      for (byte innercount = 0; innercount < 40; innercount++) {
        lightemup(leds12[outercount][0], leds12[outercount][1], 1);
        lightemup(leds12[outercount + 2][0], leds12[outercount + 2][1], 1);
      }
    }
  }
  for (byte innercount = 0; innercount < 40; innercount++) {
    lightemup(leds12[0][0], leds12[0][1], 1);
    lightemup(leds12[2][0], leds12[2][1], 1);
    deadled(1);
  }
}

// two leds moving from side to side
void backandforthone() {
  for (byte theloops = 0; theloops < looper; theloops++) {
    for (byte outercount = 0; outercount < 6; outercount++) {
      for (byte innercount = 0; innercount < 110; innercount++) {
        lightemup(leds12[outercount][0], leds12[outercount][1], 1);
        lightemup(leds12[11 - outercount][0], leds12[11 - outercount][1], 1);
      }
    }
    deadled(1);
  }
}

// four leds moving from side to side
void backandforthtwo() {
  for (byte theloops = 0; theloops < looper; theloops++) {
    for (byte outercount = 0; outercount < 11; outercount++) {
      for (byte innercount = 0; innercount < 20; innercount++) {
        lightemup(leds12[outercount][0], leds12[outercount][1], 1);
        lightemup(leds12[outercount + 1][0], leds12[outercount + 1][1], 1);
        lightemup(leds12[10 - outercount][0], leds12[10 - outercount][1], 1);
        lightemup(leds12[11 - outercount][0], leds12[11 - outercount][1], 1);
      }
    }
    deadled(1);
  }
}

// choose effect
void loop() {
  Button();
  //  randomleds();
  //   delay(betweenies);
  //  cylons();
  //  delay(betweenies);
  if (buttoncount = 0)
  { twobytwo();
   // delay(betweenies);
  }
  if (buttoncount = 1) {
    backandforthone();
   // delay(betweenies);
  }
  //   backandforthtwo();
  //   delay(betweenies);
}

void Button() {
//  static unsigned long last_interrupt_time = 0;
// unsigned long interrupt_time = millis();
buttoncount = digitalRead(buttonPin); 
  
    if (buttoncount < 1) {
      buttoncount++;

    }
    else {
      buttoncount = 0;
    }


}

change your statement

myrand = analogRead(PB1);

to

myrand = analogRead(A1);

and it will compile for Attiny13. PB1 is the digital function of pin number 6, but you want the analog function of PB2 (pin number 7). Pin number 6 has no analog function in a At13.

Then If i were you I would look at some Switch-Case examples, as that's more or less designed to be a ladder of different functions to be selected by the case number.

Then when using a button it is good to understand if you need to debounce it.