if enemyX <= 0:
enemyX = 0
enemy_valx = 0.3
enemyY += enemy_valy
elif enemyX >= 964:
enemyX = 964
enemy_valx = -0.3
enemyY += enemy_valy
if enemyY >= 400:
print("You has lost the game")
sys.exit()
if bulletY <= 0:
bulletY = 500
bullet.bullet_state = False
if bullet.bullet_state:
bullet.display(screen, x=bulletX, y=bulletY)
bulletY -= 1
## collision
collision = isCollision(enemyX, enemyY, bulletX, bulletY)
if collision:
bulletY = 500
bullet.bullet_state = False
score += 1
print(f"Score {score}")
enemyX = random.randint(0, 900)
enemyY = random.randint(50, 150)
