Programming issue

I am working on a program to control some led lights through a relay on an rc car. i can turn on and off the relay, and i can blink the relay, but when i combine the two to turn on and a blinking led, the button does not control the relay. The end result of this program will be 3 switch functions off, solid on, blink repeat. So any help is appreciated

//Analog output
//

int switchPin = 2;
int ledPin = 4;
boolean lastButton = LOW;
boolean currentButton = LOW;
boolean ledOn = false;


 void setup() {
  // put your setup code here, to run once:
 pinMode(switchPin, INPUT);
 pinMode(ledPin, OUTPUT);

}
boolean debounce(boolean last)
{
  boolean current = digitalRead(switchPin);
  if (last != current)
  {
    delay(5);
    current = digitalRead(switchPin);
  }
  return current;
}
void loop() 
{
  currentButton = debounce(lastButton);
 if (lastButton == LOW && currentButton == HIGH)
 {
   ledOn = !ledOn;
 }
 lastButton = currentButton;
 digitalWrite(ledPin, ledOn);
 delay(625);
 digitalWrite(ledPin, !ledOn);
 delay(625);

]

blink without delay:

/* Blink without Delay

 Turns on and off a light emitting diode (LED) connected to a digital
 pin, without using the delay() function.  This means that other code
 can run at the same time without being interrupted by the LED code.

 The circuit:
 * LED attached from pin 13 to ground.
 * Note: on most Arduinos, there is already an LED on the board
 that's attached to pin 13, so no hardware is needed for this example.
 
 created 2005
 by David A. Mellis
 modified 8 Feb 2010
 by Paul Stoffregen
 modified 11 Nov 2013
 by Scott Fitzgerald
 
 
 This example code is in the public domain.
 
 http://www.arduino.cc/en/Tutorial/BlinkWithoutDelay
 */

// constants won't change. Used here to set a pin number :
const int ledPin =  13;      // the number of the LED pin

// Variables will change :
int ledState = LOW;             // ledState used to set the LED

// Generally, you should use "unsigned long" for variables that hold time
// The value will quickly become too large for an int to store
unsigned long previousMillis = 0;        // will store last time LED was updated

// constants won't change :
const long interval = 1000;           // interval at which to blink (milliseconds)

void setup() {
  // set the digital pin as output:
  pinMode(ledPin, OUTPUT);
}

void loop()
{
  // here is where you'd put code that needs to be running all the time.

  // check to see if it's time to blink the LED; that is, if the
  // difference between the current time and last time you blinked
  // the LED is bigger than the interval at which you want to
  // blink the LED.
  unsigned long currentMillis = millis();
 
  if(currentMillis - previousMillis >= interval) {
    // save the last time you blinked the LED 
    previousMillis = currentMillis;   

    // if the LED is off turn it on and vice-versa:
    if (ledState == LOW)
      ledState = HIGH;
    else
      ledState = LOW;

    // set the LED with the ledState of the variable:
    digitalWrite(ledPin, ledState);
  }
}

The demo Several Things at a Time is an extended example of BWoD.

...R

i have tried adding that to the code and now the switch turns on and off the relay, no blink

//Analog output
//

const int switchPin = 2;
const int ledRelay4 = 4;
boolean lastButton = LOW;
boolean currentButton = LOW;
boolean ledOn = false;

int ledState = LOW;

unsigned long previousMills = 0;

const long interval = 625;


 void setup() {
  // put your setup code here, to run once:
 pinMode(switchPin, INPUT);
 pinMode(ledRelay4, OUTPUT);

}
boolean debounce(boolean last)
{
  boolean current = digitalRead(switchPin);
  if (last != current)
  {
    delay(5);
    current = digitalRead(switchPin);
  }
  return current;
}
void loop() 
{
  currentButton = debounce(lastButton);
 if (lastButton == LOW && currentButton == HIGH)
 {
  unsigned long currentMills = millis();

  if(currentMills - previousMills >= interval) {

    previousMills = currentMills;

    if(ledState == LOW)
      ledState = HIGH;
   else
      ledState = LOW;

         digitalWrite(ledRelay4, ledState);
  }
   //ledOn = !ledOn;
 }
 lastButton = currentButton;
 //digitalWrite(ledRelay4, ledOn);




}

MacBeth505:

Almost…

That shoud be [code]...[/code]

you missed adding a flag

 if (lastButton == LOW && currentButton == HIGH)
  {
  //do this once
  }
  lastButton = currentButton;
  //they will both equal the same here so next loop 
  //the if will fail

this is the same code using a flag

const int switchPin = 2;
const int ledRelay4 = 4;
boolean lastButton = LOW;
boolean currentButton = LOW;
boolean ledOn = false;

int ledState = LOW;
byte flag = 0;
unsigned long previousMills = 0;

unsigned long interval = 625;


void setup() {
  // put your setup code here, to run once:
  pinMode(switchPin, INPUT);
  pinMode(ledRelay4, OUTPUT);

}
boolean debounce(boolean last)
{
  boolean current = digitalRead(switchPin);
  if (last != current)
  {
    delay(5);
    current = digitalRead(switchPin);
  }
  return current;
}


void loop()
{
  unsigned long currentMills = millis();
  currentButton = debounce(lastButton);

  if (lastButton == LOW && currentButton == HIGH)
  {
    flag = !flag;//name flag anything that makes sense
  }
  lastButton = currentButton;




  if (flag == 1) {
    if (currentMills - previousMills >= interval) {

      previousMills = currentMills;

      if (ledState == LOW)
        ledState = HIGH;
      else
        ledState = LOW;

      digitalWrite(ledRelay4, ledState);
    }
  }
}