====Using Delays====

The delay() function call can cause problems when you want to add additional functionality to your code, such as external controls or multiple strings or functions.



Bad delay code:

<code>

void loop() {

  // do something
  delay(1000);
}
</code>


Hand written delay code:

<code>

unsigned long timer;                        // the timer
unsigned long interval = 1000;              // the repeat interval

void setup() {
  timer = millis();                         // start timer
}

void loop() {
  if ((millis()-timer) > interval) {        // timed out
    timer += interval;                      // reset timer by moving it along to the next interval 
    // do something
  }
}

</code>


Using the FastLED scheduler:

<code>

void loop() {
  EVERY_N_MILLIS(10) {
    afunction();
  }
  FastLED.show();
}

void afunction() {
  // do something
}

</code>


You could use timer based library function such as beatsin8():

<code>

void loop() {
  uint8_t myhue = beatsin8(10,0,255)
  fill_solid(leds,NUM_LEDS, CHSV(myhue, 255,255));
  FastLED.show();
}

</code>