// Arduino MEGA+ A4988 stepper motor driver + L29383N+Stepper motor + dc motor + push button +3 limit switch //
const int PB_PIN = 11; // push button pin
const int LMT_1= 28; // Limit switch1 pin
const int LMT_2= 29; // Limit switch2 pin
const int LMT_3= 30; // Limit switch3 pin
const int DIR_PIN=2; // Stepper moto dir pin
const int STEP_PIN=3; // Stepper moto Step pin
const int MOTA_A =7; // motor pin a
Const in MOTA_B=8; // motor pin a
Int buttonState=0;

Void setup(){
    pinMode(PB_PIN,INPUT);
    pinMode (LMT_1,INPUT);
    pinMode (LMT_2,INPUT);
    pinMode (LMT_3,INPUT);
    pinMode (DIR_PIN,OUTPUT);
    pinMode (STEP_PIN,OUTPUT);
    pinMode (MOTA_A,OUTPUT);
    pinMode (MOTA_B,OUTPUT);
}

Void loop(){
    buttonState=digitalRead(PB_PIN); //when push button pressed
    if (buttonState == LOW) {
        buttonState=digitalRead(LMT_1); //if motor is not on home point
        if (buttonState == LOW) {
            digitalWrite(DIR_PIN, HIGH);
            digitalWrite(STEP_PIN, LOW);
            buttonState=digitalRead(LMT_1); // when motor will come on home point
            if (buttonState == HIGH) {
                breck
            }
        }
        buttonState=digitalRead(LMT_1); // to move stepper motor forward
        if (buttonState == HIGH) {
            digitalWrite(DIR_PIN, LOW);
            digitalWrite(STEP_PIN, HIGH);
            buttonState=digitalRead(LMT_2); // stepper motor at second point
            if (buttonState == HIGH) {
                digitalWrite(DIR_PIN, LOW);
                digitalWrite(STEP_PIN, LOW);
                digitalWrite(MOTA_A,HIGH); // run the dc motor
                digitalWrite(MOTA_B,LOW);
                dealy (10000);
                digitalWrite(MOTA_A, LOW); // off the dc motor
                digitalWrite(MOTA_B,LOW);
                digitalWrite(DIR_PIN, LOW); // stepper motor to move second 3rd point
                digitalWrite(STEP_PIN, HIGH);
                buttonState=digitalRead(LMT_3);
                if (buttonState == HIGH) { // stepper motor to back to home point
                    digitalWrite(DIR_PIN, HIGH);
                    digitalWrite(STEP_PIN, LOW);
                    buttonState=digitalRead(LMT_1);
                    if (buttonState == HIGH) {
                        breck;
                    }
                }
            }
        }
    }