collision problem

import pygame
screen = pygame.display.set_mode((810,810))
(width,height) = (359,255)
(wallwidth,wallheight) = 50,50
x = 0
y = 0
wx = 700
wy = 700
color = (0,0,0)
pygame.display.set_caption( 'da biggest BALLER!waw' )
dontfaqwiththeshaq = pygame.image.load('shaq_fu.webp').convert()
shaqcraq = pygame.image.load('the biggest bird.jpg').convert()

class Sprite(pygame.sprite.Sprite):

        def __init__(self,image,x,y):
                super().__init__()
                self.image = pygame.Surface([width,height])
                self.x = x
                self.y = y
                pygame.draw.rect(self.image, color, pygame.Rect(0, 0, width,height))
                self.rect = self.image.get_rect()
        def render(self,image):
            pygame.draw.rect(screen,color,(x,y,width,height))



object_ = Sprite(dontfaqwiththeshaq, x, y)
object_.rect.x = x
object_.rect.y = y
all_sprites_list = pygame.sprite.Group()
all_sprites_list.add(object_)

class Wall(pygame.sprite.Sprite):
        def __init__(self,wimage,wx,wy):
                super().__init__()
                self.wimage = pygame.Surface([wallwidth,wallheight])
                self.wx = wx
                self.wy = wy
                pygame.draw.rect(self.wimage,color,pygame.Rect(0,0,wallwidth,wallheight))
                self.rect = self.wimage.get_rect()

        def render(self,wimage):
            pygame.draw.rect(screen,color,(wx,wy,wallwidth,wallheight))

wallblock = Wall(shaqcraq,wx,wy)
wallblock.rect.x = wx
wallblock.rect.y = wy
all_sprites_list.add(wallblock)

wrect = wallblock.rect
rect = object_.rect
collidelist = pygame.sprite.spritecollide(object_,all_sprites_list,False)

running = True
delta_time = 0.1
x += 50 * delta_time
y += 50 * delta_time
clock = pygame.time.Clock()
while running:

        all_sprites_list.update()
        screen.blit(shaqcraq,(0,0))
        object_.render(screen)
        wallblock.render(screen)
        screen.blit(dontfaqwiththeshaq,(x,y))
        keys = pygame.key.get_pressed()
        if keys[pygame.K_LEFT]:
                        x -=30
        if keys[pygame.K_RIGHT]:
                        x +=30
        if keys[pygame.K_DOWN]:
                        y +=30
        if keys[pygame.K_UP]:
                        y -=30
        for sprite in collidelist:
                color = (0,255,255)

        for event in pygame.event.get():
                if event.type == pygame.QUIT:
                        running = False
        pygame.display.flip()
        delta_time = clock.tick(60) / 1000
        delta_time = max(0.001, min(0.1, delta_time))

pygame.quit()