RuntimeError: No access to /dev/mem. Try running as root! "ubuntu" code example

Example: erreude code Can't open /dev/mem: Permission denied Traceback (most recent call last):

from rpi_ws281x import *

strip = Adafruit_NeoPixel(14, 18, 800000, 10, False, 255, 0)
strip.begin()

strip.setPixelColor(5, Color(255,0,0))
strip.show()