import pygame

# Define some colors
BLACK = (0, 0, 0)
WHITE = (255, 255, 255)
GREEN = (0, 255, 0)
RED = (255, 0, 0)
BLUE = (0, 0, 255)

# Define some constants
WIDTH = 800
HEIGHT = 600
FPS = 60
GRAVITY = 0.5

# Define some variables
x = WIDTH / 2
y = HEIGHT / 2
vx = 0
vy = 0

# Define some functions


def draw_dot(x, y):
    pygame.draw.circle(window, BLACK, (int(x), int(y)), 10)


def move_dot(x, y, vx, vy):
    x += vx
    y += vy
    return x, y


def apply_gravity(vy):
    vy += GRAVITY
    return vy


def jump(vy):
    vy = -10
    return vy


# Initialize pygame
pygame.init()

# Create a window
# Create a clock
clock = pygame.time.Clock()

# Create a window
window = pygame.display.set_mode((WIDTH, HEIGHT))

# Set window title
pygame.display.set_caption("My Game")

# Game loop
running = True
# Set the frame rate
clock.tick(FPS)

while running:
    # Process events
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False
        if event.type == pygame.KEYDOWN:
            if event.key == pygame.K_a:
                vx = -5
            if event.key == pygame.K_d:
                vx = 5
            if event.key == pygame.K_SPACE:
                vy = jump(vy)
        if event.type == pygame.KEYUP:
            if event.key == pygame.K_a:
                vx = 0
            if event.key == pygame.K_d:
                vx = 0

            running = False
    x, y = move_dot(x, y, vx, vy)
    vy = apply_gravity(vy)

    # Render
    # Clear the screen

    # Draw the dot
    draw_dot(x, y)

    # Update the display
    # Update

    # Render
    window.fill((255, 255, 255))
    pygame.display.update()

# Close window on quit
pygame.quit()