// breaking down the chicken code to find the bug


int sensorPin = A0;    // select the input pin for the potentiometer
int ledPin =  13;      // the number of the LED pin
int ledState = LOW;   // ledState used to set the LED
int sensorValue = 0;  // variable to store the value coming from the sensor
int homeswPin = 4;         // toggle sw for home sequence
int homelimitswPin = 5;         //  home limit sensor
int timer = 0;          // variable to store timer
int uplimitswPin = 2;     // up limit switch
int dwnlimitswPin = 3;     // down limit switch
int upoutputPin = 7;      // output to drive up
int upoutput2Pin = 8;      // output to drive up
int dwnoutputPin = 9;      // output to drive down
int dwnoutput2Pin = 10;      // output to drive down
long previousMillis = 0;        // will store last time LED was updated
long interval = timer;        //    interval at which to change 3519 x sensor value (milliseconds)
long timedown = timedown;           // interval at which to change 3519 x sensor value (milliseconds
unsigned long currentMillis = millis();

void setup() { // put your setup code here, to run once:

  pinMode(ledPin, OUTPUT);
  pinMode(homeswPin, INPUT_PULLUP);
  pinMode(homelimitswPin, INPUT);
  pinMode(uplimitswPin, INPUT);
  pinMode(dwnlimitswPin, INPUT);
  pinMode(upoutputPin, OUTPUT);
  pinMode(dwnoutputPin, OUTPUT);
  digitalWrite(7, HIGH);  // +up safety stop motor
  digitalWrite(8, HIGH);  // -up safety stop motor
  digitalWrite(9, HIGH);  // + dwn safety stop motor
  digitalWrite(10, HIGH); // - dwn safety stop motor

}


void loop() {

  { // section 1 find home and stay there
    while (digitalRead(homeswPin) == LOW); {
  if  // dont know where it is but need to find home or up limit
  (digitalRead(homeswPin) == LOW && digitalRead(homelimitswPin) == HIGH &&
      digitalRead(uplimitswPin) == HIGH && digitalRead(dwnlimitswPin) == HIGH) {
    // drives motor up
    digitalWrite(upoutputPin, LOW);
  }
  // move until home or up limit switch found
  else if
  (digitalRead(homelimitswPin == LOW) || digitalRead(uplimitswPin == LOW)) {
    //turn motor off
    (digitalWrite(upoutputPin, HIGH));
  }
  else if
  // at up limit need to go home
  (digitalRead(homeswPin) == LOW && digitalRead(uplimitswPin) == LOW) {

    digitalWrite(dwnoutputPin, LOW); // drives motor down
    //at home ?
    digitalRead(homelimitswPin == HIGH);

    digitalWrite(dwnoutputPin, HIGH);
  } //turns motor off}
  else if
  // at down limit go home
  (digitalRead(homeswPin) == LOW && digitalRead(dwnlimitswPin) == LOW) {
    // drives motor up
    digitalWrite(upoutputPin, LOW);
    //at home
    (digitalRead (homelimitswPin) == 0);
    //turn motor off
    digitalWrite(upoutputPin, HIGH);
  }
  else
    //  at home with home switch on stay here
    (digitalRead(homeswPin) == LOW && digitalRead(homelimitswPin) == LOW);
}