Blink an LED until a button is pushed

1

Im trying to blink a series of LED’s until a button is pushed. I was trying to use a DO While command but you have to hold down the button until the code comes around to the button check. Anyone want to help me simplify this?

void loop()
{

do
{

analogWrite(led1, 75); // Turn ON the LED
analogWrite(led2, 75); // Turn ON the LED
analogWrite(led3, 75); // Turn ON the LED
analogWrite(led4, 75); // Turn ON the LED
analogWrite(led5, 75); // Turn ON the LED
analogWrite(led_low, 0); // Turn off the LED
delay(750); // Wait for .75 seconds
analogWrite(led1, 255); // Turn ON the LED
analogWrite(led2, 255); // Turn ON the LED
analogWrite(led3, 255); // Turn ON the LED
analogWrite(led4, 255); // Turn ON the LED
analogWrite(led5, 255); // Turn ON the LED
delay(750); // Wait for .75 seconds
val = digitalRead(button5);
val = digitalRead(button4);

} while (val = 0);

2

This can be done many ways. The way I like to use is to git rid of the delay you have and use a comparrison against millis() to determine when to swtich.

I actually wrote a library a while back which may suite your needs: https://github.com/harrisonhjones/LEDEffect

The following code (as an example) would blink the LEDs if the button is not pressed and stop blinking them while the button is pressed.

#include <LEDEffect.h>   // May require #include "LEDEffect.h" instead if the compiler complains

LEDEffect led1(A0);
LEDEffect led2(A1);
LEDEffect led3(A2);
LEDEffect led4(A3);
LEDEffect led5(A4);
LEDEffect led6(A5);

void setup()  {
}

void loop()  {
    led1.update();  // Call update as often as possible for smooth animation
    led2.update();  // Call update as often as possible for smooth animation
    led3.update();  // Call update as often as possible for smooth animation
    led4.update();  // Call update as often as possible for smooth animation
    led5.update();  // Call update as often as possible for smooth animation
    led6.update();  // Call update as often as possible for smooth animation

    if(digitalRead(btn1))
    {
        led1.off();
        led2.off();
        led3.off();
        led4.off();
        led5.off();
        led6.off();
    }
    else
    {
        led1.blink(250);    // Set the LEDs a blink'n
        led2.blink(250);    // Set the LEDs a blink'n
        led3.blink(250);    // Set the LEDs a blink'n
        led4.blink(250);    // Set the LEDs a blink'n
        led5.blink(250);    // Set the LEDs a blink'n
        led6.blink(250);    // Set the LEDs a blink'n
    }
}