delay(500);
myservo.write(90);
delay(1000);
myservo.write(180);
delay(1000);
leftDistance=Distance_test();


delay(500);
myservo.write(90);
delay(1000);

if(rightDistance>leftDistance){
right();
delay(360);
}
else if(rightDistance<leftDistance){
left();
delay(360);
}
else if((rightDistance<=20)||(leftDistance<=20)){
back();
delay(180);
}

else{
forward();
}
}
else{
forward();
}
}