Servo motor, LDR and LEDs

Using Arduino Programming Questions
1

I am currently working on a project including an LDR, a servo motor and LEDS. I have written the code however, when I tried to combine them the LDR controlling the servo stopped working but the LEDs are working. Please can you help combine my code so that both things can happen simultaneously.

#include <Servo.h>

Servo myservo;

const int ldrpin = A0;
const int servopin = 8;

int ldrValue;
int angle = 0;
int LED1 = 13;
int LED2 = 12;

void setup() {
// put your setup code here, to run once:
Serial.begin(9600);
myservo.attach (servopin);
pinMode(LED1, OUTPUT);
pinMode(LED2, OUTPUT);
}

void loop() {
// put your main code here, to run repeatedly:
ldrValue = analogRead(ldrpin);
angle = map (ldrValue, 0, 1023, 0, 270);
Serial.println(angle);
myservo.write (angle);
delay (15);

digitalWrite(LED1, HIGH);
delay(3000);
digitalWrite(LED2, LOW);
delay(3000);
digitalWrite(LED1,LOW);
delay(3000);
digitalWrite(LED2, HIGH);
delay(3000);
digitalWrite(LED2, LOW);
delay(3000);
}

2 
digitalWrite(LED1, HIGH);
delay(3000);
digitalWrite(LED2, LOW);
delay(3000);
digitalWrite(LED1,LOW);
delay(3000);
digitalWrite(LED2, HIGH);
delay(3000);
digitalWrite(LED2, LOW);
delay(3000);

This portion of code does nothing but turn the LED on and off for 15 seconds during which time the LDR will not be read. Is that what you want ?

Look at Using millis() for timing. A beginners guide, Several things at the same time and look at the BlinkWithoutDelay example in the IDE.

3

Thank you for your response.
I would like the LDR to control the servo motor at the same time as the leds are on

4

lewis1706:
I would like the LDR to control the servo motor at the same time as the leds are on

I think that much is obvious. Have you looked at the links provided? That's where you will find the solution.

5

Without all the useless delay()s, what does the code ACTUALLY do?