Organic Light pattern with switch (doesn't work)

code.py

import time
import board
import neopixel
from digitalio import DigitalInOut, Direction, Pull
 
pixel_pin = board.D2
num_pixels = 12

switch = DigitalInOut(board.D3)
switch.direction = Direction.INPUT
switch.pull = Pull.UP
 
pixels = neopixel.NeoPixel(pixel_pin, num_pixels, brightness=0.5, auto_write=False)
ROBIN = (222,35,5)
ROBINDIM = (111,18,3)
ROBINDIMMER = (56,12,2)
ROBINDIMMEST = (28,6,1)
OFF = (0,0,0)

press_count=0

def press_check():
    global press_count
    if (switch.value==False):
        press_count+=1
        if press_count>2:
            press_count=0
        time.sleep(0.3)
    print(press_count)

while True:
    print(switch.value)
    if (switch.value==True):
        for i in range(0,12,1):
            pixels[i]=OFF
            pixels.show()
            time.sleep(0.1)
            pixels[i-1]=ROBINDIMMEST
            pixels.show()
            time.sleep(0.1)
            if (switch.value==False):
                pixels.fill(OFF)
                pixels.show()
            pixels[i-2]=ROBINDIMMER
            pixels.show()
            time.sleep(0.1)
            pixels[i-3]=ROBINDIM
            pixels.show()
            time.sleep(0.1)
            pixels[i-4]=ROBIN
            pixels.show()
            time.sleep(0.1)
    else:
        pixels.fill(OFF)
        pixels.show()
        time.sleep(1)  # debounce delay