#include <TinyWS2812B.h>

TinyWS2812B myLeds(int dataPin, int numberOfLEDs);

//Example: Use Pin 2 as the data pin for the WS2812B-LEDs and use 20 LEDs
TinyWS2812B myLEDs(2, 20);

myLEDs.setColor(int position, byte red, byte green, byte blue);

//Example: Set the color of the fifth LED to red:
myLEDs.setColor(4, 255, 0, 0);

myLEDs.updateLEDs();

// include the library:
#include <TinyWS2812B.h>

// create an instance:
TinyWS2812B myLEDs(4, 20);

void setup() {
  // use a for-loop to cycle through every position of the LED string:
  for(int pos = 0; pos<20; pos++){
    // set the color of the LED at the current position to green:
    myLEDs.setColor(pos, 0, 255, 0);
  }
  // update the LEDs:
  myLEDs.updateLeds();
}

void loop() {
  //nothing here
}

//include the library:
#include <TinyWS2812B.h>

// store number of LEDs in a variable:
int numberOfLEDs = 20;
// create an instance of TinyWS2812B:
TinyWS2812B myLEDs(2, numberOfLEDs);

void setup() {
 //nothing here
}

void loop() {
  // use a for-loop to cycle through every LED:
  for(int pos = 0; pos<numberOfLEDs; pos++){
    // turn the previous LED off and set the current LED to white:
    myLEDs.setColor(pos-1, 0, 0, 0);
    myLEDs.setColor(pos, 255, 255, 255);
    // update the LEDs:
    myLEDs.updateLeds();
    // wait 100ms until next shift of the LED:
    delay(100);
  }
  // turn the last LED off at the end:
  myLEDs.setColor(numberOfLEDs-1, 0, 0, 0);
}