int pin[8]={2,3,4,5,6,7,8,9};
int steps[][4] = 
{
{HIGH,HIGH,LOW,LOW},
{HIGH,LOW,LOW,HIGH},
{LOW,LOW,HIGH,HIGH},
{LOW,HIGH,HIGH,LOW},
} ;

float numofroun=4.5; //Change accordingly to your needs

int current=1;
int type=3;
int place=0;

int claps = 0;
long detectionSpanInitial = 0;
long detectionSpan = 0;
long spancondition;
bool spanconditioncheck=false;

bool lock=true;

int lastPauseState = LOW;   
long lastPauseTime = 0;
int PauseState;
int Pausereading;
bool Pauseled=false;
bool pause=false;

int lastReturnState = LOW;   
long lastReturnTime = 0;
int ReturnState;
int Returnreading;

void setup() {
for (int num=0; num<5; num++) pinMode(pin[num],OUTPUT);
for (int num=5; num<8; num++) pinMode(pin[num],INPUT);
}

void reset(){
for(int num=0;num<4;num++) digitalWrite(pin[num],LOW);
}


void stepper()
{
for (int num=0; num<4;num++) { digitalWrite(pin[num],steps[abs(type-current)][num]);} if(type==0) {++place;} if(type==3) {--place;} delay(2); } void sound() { int sensorState = digitalRead(pin[5]); if (sensorState == 0){ if (claps == 0){ detectionSpanInitial = detectionSpan = millis(); claps++; } else if (claps > 0 && millis()-detectionSpan >= 50){
detectionSpan = millis();
claps++;
}
}
if (millis()-detectionSpanInitial >= 400)
{
if (claps == 2)
{
lock=false;        
if ((place!=1024*numofroun)&&(place!=512*numofroun)) {type=abs(type-3);}
spancondition=millis();
}
claps = 0;
}
}

void button1()
{
Pausereading = digitalRead(pin[6]);
if (Pausereading != lastPauseState) 
{
lastPauseTime = millis();
}
if ((millis() - lastPauseTime) > 50)
{
if (Pausereading != PauseState) {
PauseState = Pausereading;
if (PauseState == HIGH) {
Pauseled=!Pauseled;
pause=!pause;
spancondition=millis();
if (Pauseled) {digitalWrite(pin[4],HIGH);}
if (!Pauseled) {digitalWrite(pin[4],LOW);}
}
}
}
lastPauseState = Pausereading;
}

void button2()
{
Returnreading = digitalRead(pin[7]);
if (Returnreading != lastReturnState) 
{
lastReturnTime = millis();
}
if ((millis() - lastReturnTime) > 50)
{
if (Returnreading != ReturnState) {
ReturnState = Returnreading;
if (ReturnState == HIGH) {
type=3;
while (place>0)
{
for (int num=0; num<4;num++) { digitalWrite(pin[num],steps[3-current][num]);} --place; if (current==3) {current=0;} else ++current; delay(2); } reset(); spancondition=millis(); } } } lastReturnState = Returnreading; } void loop() { if (lock==true) {button1();button2();} if (!pause) { if ((lock==true)&&(millis()-spancondition>1000)) {sound();}
if (lock==false) {stepper();spanconditioncheck=false; }
if ((place==2048*numofroun)or(place==0)or(((place==1024*numofroun)or(place==512*numofroun))&&(type==3))){
lock=true;
reset();
if (!spanconditioncheck){
spancondition=millis();
spanconditioncheck=true;
}
}
if (current==3) {current=0;}
else ++current;
}
}