This code iterates through numbers from 0 to 255 and...

This code iterates through numbers from 0 to 255 and performs certain operations when the current number (i) is divisible by 30 (i.e., i % 30 == 0). Here's a detailed breakdown of what the code does:

Code Analysis:

1. for(int i=0; i<=255; i++):

   • A loop runs from i = 0 to i = 255 (inclusive), incrementing i by 1 on each iteration.

2. if(i % 30 == 0):

   • Inside the loop, the code checks if i is divisible by 30 (i.e., the remainder from dividing i by 30 is 0). If true, the code inside the if block executes.

3. fill_rainbow(leds, NUM_LEDS, i, 255 / NUM_LEDS);:

   • This function (likely provided by the FastLED library) fills the leds array (representing LED colors) with a "rainbow" gradient.
     • leds: An array representing the LED strip.
     • NUM_LEDS: Represents the number of LEDs in the array.
     • i: The starting color index for the rainbow.
     • 255 / NUM_LEDS: The delta or step between the colors of the rainbow for each LED.

4. FastLED.show();:

   • This call updates the physical LEDs to show the colors stored in the leds array.

5. delay(10000);:

   • The code pauses execution for 10,000 milliseconds (10 seconds) before continuing to the next iteration or operation.

Overall Functionality:

The code generates a rainbow gradient across a strip of LEDs and iteratively shifts/updates the starting color of the rainbow every 30th value of i. The LEDs are updated on the strip (via FastLED.show()), and the code waits 10 seconds before continuing the loop. This effectively creates a slowly shifting rainbow effect on the LED strip, with updates happening every 10 seconds when i is divisible by 30.

Note: This code assumes the FastLED library is being used for LED control. The behavior also depends on correctly defined leds and NUM_LEDS variables elsewhere in the program.