Calculating collisions between objects - pygame python 3.6

Since i'm studying software engineering I decided to do some programming in my holidays so im currently making a game, will update with more videos later. I also decided that i would start making basic tutorials for things i found hard when learning python.

leave a comment if you wish to have a tutorial on a specific part of one of my videos, or want me to do a tutorial video on something you're having trouble with.

contact me on here with any queries.


Outtro Music: http://www.bensound.com


~~~~ pre written code ~~~~

import pygame

pygame.init()

white = (255,255,255)
red = (255,0,0)
black = (0,0,0)

screen_size = (200, 200)

screen = pygame.display.set_mode(screen_size)
pygame.display.set_caption("Gravity")
screen.fill(white)

pygame.display.flip()

clock = pygame.time.Clock()
fps = 120

x = 100
y = 100

speed = 10

running = True
pos = (x,y)
ball_size = 15
limits = (0,100)


while running:
pos = (x, y)
screen.fill(white)
for event in pygame.event.get():
if event.type == pygame.QUIT:
running = False
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_w:
y -= speed
elif event.key == pygame.K_a:
x -= speed
elif event.key == pygame.K_s:
y += speed
elif event.key == pygame.K_d:
x += speed



pygame.draw.rect(screen, black, (0, 700, 1000, 100))
pygame.draw.circle(screen,red, pos, ball_size)

pygame.display.flip()
clock.tick(fps)
My website: https://tes.page.link/rniX