Arduino Quick Shifter without Display and Need to Reupload the code if you want to adjust the values

KazeShifterNoDisplay.ino

   /*
   * KazeShifter Arduino Adjustable Open Source Quick Shifter
   * Copyright (c) Muhammad Tresna Mukti
   * created by : Muhammad Tresna Mukti aka Kazemito Haruhi
   * Last Updated : March 2, 2020 Indonesia Time (GMT+07:00)
   *
   * For more information about this code, Go to link below
   * YouTube        : https://www.youtube.com/c/KazemitoHaruhi/
   * Instructables  : https://www.instructables.com/member/TresNaa/
  */
  
int cutoff=70;   // Set Engine Cutoff time (If you're using relay, do not set timing under 40ms)
int dly=0;       // Set Delay time before next Upshift
int i=0;

void setup() {
  pinMode(2, INPUT_PULLUP);   // Sensor pin
  pinMode(5, OUTPUT);         // Relay Pin
  pinMode(6, OUTPUT);         // LED pin
  digitalWrite(5, HIGH);      // Set Relay on High State
  digitalWrite(6, HIGH);      // Turn on LED
}

void loop() {
  int snsrstate=digitalRead(2);
  if (snsrstate==HIGH) {
    i=0;
    delay(50);
  }
  if (snsrstate==LOW && i==0) {
    i+=1;
    digitalWrite(5, LOW);
    digitalWrite(6, LOW);
    delay(cutoff);
    digitalWrite(5, HIGH);
    digitalWrite(6, HIGH);
    delay(dly);
  }
}