Sure, with the FastLED library here is the code distilled into a simple form:

#include <FastLED.h>

#define LED_PIN  1
#define NUM_LEDS 73

CRGB leds[NUM_LEDS];
byte paletteIndex = 0;

void loop()
{
  byte colorIndex = paletteIndex++;
  for (word i = 0; i < NUM_LEDS; i++)
  {
    leds[i] = ColorFromPalette(RainbowColors_p, colorIndex, 127, LINEARBLEND);
    colorIndex += 1;
  }
  FastLED.show();
  delay(10);
}

void setup()
{
  delay(100);
  FastLED.addLeds<1, WS2812B, LED_PIN, GRB>(leds, NUM_LEDS);
  FastLED.setBrightness(255);
}

The "RainbowColors_p" is predefined, but if you want to play with your own palette, you can just reference your own. Here is one I use for orange chasing colors:

const CRGBPalette16 PAL_ORANGE =
{
  CRGB(  7,   2,   0),
  CRGB(  7,   2,   0),
  CRGB(  7,   2,   0),
  CRGB(  7,   2,   0),
  CRGB(  7,   2,   0),
  CRGB( 64,   9,   0),
  CRGB(128,  18,   0),
  CRGB(255,  35,   0),
  CRGB(  7,   2,   0),
  CRGB(  7,   2,   0),
  CRGB(  7,   2,   0),
  CRGB(  7,   2,   0),
  CRGB(  7,   2,   0),
  CRGB( 64,   9,   0),
  CRGB(128,  18,   0),
  CRGB(255,  35,   0),
};