const int sensor1 = 3;
const int sensor2 = 4;
const int sensor3 = 5;
const int sensor4 = 6;
const int sensor5 = 7;
const int coil1 = 8;
const int coil2 = 9;
const int coil3 = 10;
const int coil4 = 11;
const int coil5 = 12;
const int button = 2;

int pos = 0;
void setup() {
  Serial.begin(9600);
  // put your setup code here, to run once:
  pinMode(sensor1, INPUT);
  pinMode(sensor2, INPUT);
  pinMode(sensor3, INPUT);
  pinMode(sensor4, INPUT);
  pinMode(sensor5, INPUT);
  pinMode(coil1, OUTPUT);
  pinMode(coil2, OUTPUT);
  pinMode(coil3, OUTPUT);
  pinMode(coil4, OUTPUT);
  pinMode(coil5, OUTPUT);
  pinMode(button, INPUT);
  digitalWrite(coil1, LOW);
  digitalWrite(coil2, LOW);
  digitalWrite(coil3, LOW);
  digitalWrite(coil4, LOW);
  digitalWrite(coil5, LOW);

}
void loop() {
  if ((digitalRead(button) == HIGH) && pos == 0) {

    Serial.println("begin");
    pos = 1;
    digitalWrite(coil1, HIGH);
  }
  if ( (digitalRead(sensor1) == LOW) && (pos == 1) )
  {
    Serial.println("1 detected");
    digitalWrite(coil1, LOW);
    digitalWrite(coil2, HIGH);
    pos = 2;
  }
  if ( (digitalRead(sensor2) == LOW) && (pos == 2) )
  {
    //    Serial.print("val2:");
    //    Serial.println(analogRead(sensor2));
    Serial.println("2 detected");
    digitalWrite(coil2, LOW);
    digitalWrite(coil3, HIGH);
    pos = 3;
  }
  if ( (digitalRead(sensor3) == LOW) && (pos == 3) )
  {
    //    Serial.print("val3:");
    //    Serial.println(analogRead(sensor3));
    Serial.println("3 detected");
    digitalWrite(coil3, LOW);
    digitalWrite(coil4, HIGH);
    pos = 4;
  }
  if ( (digitalRead(sensor4) == LOW) && (pos == 4) )
  {
    //    Serial.print("val4:");
    //    Serial.println(analogReaLOWd(sensor4));
    Serial.println("4 detected");
    digitalWrite(coil4, LOW);
    digitalWrite(coil5, HIGH);
    pos = 5;
  }
  if ( (digitalRead(sensor5) == LOW) && (pos == 5) )
  {
    Serial.println("5 detected");
    digitalWrite(coil5, LOW);
    pos = 0;
  }

}