The code presented on this page can be downloaded or found in the Arduino examples menu under `Examples → SpinWearables → Animations_and_Patterns → Simple_Blink`.

Most of our code examples start with these `include` statements, as they tell the computer that there is a set of coding tools related to the SpinWheel that we will want to use.

``````#include "SpinWearables.h"
using namespace SpinWearables;``````

The instructions we write in the `setup` block are executed once when the SpinWheel device powers on. We run one single instruction called `SpinWheel.begin()` which prepares all the LEDs to accept new colors.

``````void setup() {
SpinWheel.begin();
}``````

The instructions in the `loop` block are executed repeatedly “in a loop”. This is what lets us smoothly update the brightness of the LEDs and make a simple animation.

``void loop() {``

First we store the current time in the variable `t`. The function `millis()` gives us that time.

``  int t = millis();``

Then we divide the time in equal intervals of length 2.5 seconds (2500 milliseconds). By performin division with remainder and storing only the remainder, we find the time since the last interval has started. In this computer language `a / b` means “divide a by b”, while `a % b` means “find the remainder after dividing a by b”. We store this time in `t_repeating`.

``  int t_repeating = t % 2500;``

`t_repeating` will now smoothly go from 0 to 2500, and then repeat. We want to turn this number into a brightness for each color, but the SpinWheel does not permit color settings higher than 255. Thus we divide `t_repeating` by 10 and store the result in the variable `b`.

``  int b = t_repeating / 10;``

Finally, we use the `setLargeLEDsUniform` function, which takes three numbers (a red, a green, and a blue intensity) and sets all of the large LEDs uniformly to the given color.

``````  SpinWheel.setLargeLEDsUniform(b, b, b);
SpinWheel.drawFrame();
}``````