now to assign point values to each alienupdating the score as aliens are shot down to write live score to the screenwe update the value of stats score whenever an alien is hitand then call prep_score(to update the score image but firstlet' determine how many points player gets each time they shoot down an aliensettings py def initialize_dynamic_settings(self)--snip-scoring self alien_points we'll increase the point value of each alien as the game progresses to make sure this point value is reset each time new game startswe set the value in initialize_dynamic_settings(update the score each time an alien is shot down in check_bullet_alien_ collisions()game_ functions py def check_bullet_alien_collisions(ai_settingsscreenstatssbshipaliensbullets)"""respond to bullet-alien collisions ""remove any bullets and aliens that have collided collisions pygame sprite groupcollide(bulletsalienstruetrue