int dirPin = 8;
boolean s = true;
int stepperPin = 7;
int condition=1;
char sig;
void setup() {
 pinMode(dirPin, OUTPUT);
 pinMode(stepperPin, OUTPUT);
 pinMode(13,OUTPUT);
 Serial.begin(9600);
 digitalWrite(13,HIGH);
}
 void step(boolean dir,int steps){
 digitalWrite(dirPin,dir);
 delay(50);
 for(int i=0;i<steps;i++){
   digitalWrite(stepperPin, HIGH);
   delayMicroseconds(800);
   digitalWrite(stepperPin, LOW);
   delayMicroseconds(800);
 }
}
void Close()
{
  if (s==true){
  step(true,8000);
  s=false;
}}
void Open()
{
  if (s==false){
  step(false,8000);
  s=true;
}}

void loop(){
if (Serial.available())
{
switch (char(Serial.read()))
{
case '5': 
  if (condition==1)  
  {
   condition=0;
   digitalWrite(13,LOW);
  }
  else {condition=1;digitalWrite(13,HIGH);}break;
case '4': if (condition==0){Close();}break;
case '6': if (condition==0){Open();}break;
}}
int i,aa;
aa=0;
int Array [10];
for (i=0;i<10;i++)
{
  Array [i]=analogRead(A0);
  //delay(100);
}
for (i=0;i<10;i++)
{
  aa=aa+(Array [i]);
}
if ((aa<20) && (s == true) )
{
  if (condition==1){
  step(true,8000);
  s=false;}
}
if ((aa>60) && (s == false))
{
  if (condition==1){
  step(false,8000);
  s=true;}
}
//delay (60000);
}