Simple User Interaction with PYGAME

"""Although I am only 12 YEARS OlD(tomorrow i will be 13(30th SEP))
I Made It On My Own
Please Enjoy!!

INSTAGRAM:- @ishaan_garud3097
:-) :-) :-D :-D"""


import sys
import pygame
import random
from pygame.locals import *

pygame.init()
# Resolution is ignored on Android
surface = pygame.display.set_mode((640, 480))
clock = pygame.time.Clock()
surfrect = surface.get_rect()
rect = pygame.Rect((0, 0), (128, 128))
rect.center = (surfrect.w / 2, surfrect.h / 2)
#--------------RGB---------------
r = (255,0,0)
g = (0,255,0)
b = (0,0,255)
#--------------CYMO---------------
c = (0,255,255)
y = (255,255,0)
m = (255,0,255)
o = (255,150,75)
#--------------Light--------------
pnk = (255,150,150)
l_g = (125,255,125)
l_b = (100,200,255)

colors = [r,g,b,c,y,m,o,pnk,l_g,l_b]
touched = False
while True:
    for ev in pygame.event.get():
        if ev.type == QUIT:
            pygame.quit()
        elif ev.type == pygame.MOUSEBUTTONDOWN:
            r_colors = random.choice(colors)
            if rect.collidepoint(ev.pos):
                touched = True
                # This is the starting point
                pygame.mouse.get_rel()
        elif ev.type == pygame.MOUSEBUTTONUP:
            touched = False
    clock.tick(60)
    surface.fill((0,0,0))
    if touched:
        rect.move_ip(pygame.mouse.get_rel())
        rect.clamp_ip(surfrect)
        surface.fill(r_colors)
    surface.fill((255, 255, 255), rect)
    pygame.display.flip()