Create Simple Button using Rect in pygame

RectPygame.py

import pygame as pg
import sys, os, random

pg.init()
w = 600
h = 800
res = (w, h)
fontname = "/storage/emulated/0/fonts/clacon.ttf"
sndpath = "/storage/emulated/0/sfx/test.mp3"
efn = os.path.basename(sndpath[:-4])
screen = pg.display.set_mode(res)

white = (255, 255, 255)
black  = (0, 0, 0)
gray = (211, 211, 211)
silver = (192, 192, 192)
lime = (0, 255, 0)
blue = (0, 0, 255)
red = (255, 0, 0)

def loop():
    status = 'Ready'
    i = w
    running = True
    clock = pg.time.Clock()
    button1 = pg.Rect(4, 100, 150, 50)
    button2 = pg.Rect(9, 105, 150, 50)
    button3 = pg.Rect(4, 160, 150, 50)
    button4 = pg.Rect(9, 165, 150, 50)
    
    while running:
        for event in pg.event.get():
            if event.type == pg.QUIT:
                 running = False
            elif event.type == pg.MOUSEBUTTONDOWN and event.button == 1:
                        if button2.collidepoint(event.pos):
                            pg.mixer.music.load(sndpath)
                            pg.mixer.music.play(0)
                            status = 'Playing - ' + efn
                        if button4.collidepoint(event.pos):      
                            pg.mixer.music.pause()
                            status = 'Stoped'
             

        screen.fill(white)
        pg.draw.rect(screen, gray, button1)
        pg.draw.rect(screen, black,  button2)
        pg.draw.rect(screen, gray, button3)
        pg.draw.rect(screen, black,  button4)
        
        font = pg.font.Font(fontname, 40)
        bcaption = font.render('Play', True, lime, black)
        
        bcaption2 = font.render('Stop', True, red, black)
        
        text2 = font.render('Status: ' + status, True, blue)
        
        font = pg.font.Font(fontname, 60)
        screen.blit(bcaption, (55, 110))
        screen.blit(bcaption2, (55, 172))
        screen.blit(text2, (10, 40))


        tani = "Zephio - 2021, Belajar Pygame"
        ani = font.render(tani, True, (0, random.randint(0, 255), random.randint(0, 255)))
        i -= 1
        screen.blit(ani, (i, 220))
        pg.display.update()
        clock.tick(20)


loop()
pg.quit()
sys.exit()