const byte coinSig = 4;
bool previousCoinSignal = false;
const float coinValue = 0.05;
float bankValue = 0.00;

unsigned long previousUpdateMillis = 0;
unsigned long updateInterval = 110;
bool print0flag = false;
void setup() {
  Serial.begin(9600);
  pinMode(coinSig, INPUT_PULLUP);
  previousCoinSignal = digitalRead(coinSig);

  digitalWrite(coinSig, LOW);
}

void loop() {

  byte currentCoinSignal = digitalRead(coinSig);

  if(currentCoinSignal == HIGH){
    Serial.println("coin!");
    previousUpdateMillis = millis();
    print0flag = true;

  }




  if(print0flag == true){

    if(millis() - previousUpdateMillis >= updateInterval){
    printBank();
    print0flag = false;
  }
  }


  if(currentCoinSignal != previousCoinSignal){
    previousCoinSignal = currentCoinSignal;


    if(currentCoinSignal == HIGH){
      bankValue = bankValue + coinValue;
      //printBank();
    }
  }

}
void printBank(){
Serial.print("bankvalue: ");
Serial.println(bankValue);
}