STEP 20: Now, let's set make the rocks move toward the spaceship so the user can dodge them!

  • Go to and drag two Set x Speed commands inside the event.
  • Change the name in front of the first command to top_rock.
  • Change the name in front of the second command to bot_rock.
  • Change the number in both .set_x_speed() commands to -2.

stage.set_background("space") sprite = codesters.Sprite("spaceship") sprite.set_size(0.5) sprite.go_to(-200, 0) stage.set_gravity(10) stage.disable_all_walls() def space_bar(): sprite.jump(5) # add other actions... stage.event_key("space", space_bar) def interval(): top_height = random.randint(50, 300) # sprite = codesters.Sprite("image", x, y) top_rock = codesters.Sprite("asteroid", 0, 0) top_rock.set_height(top_height) top_rock.set_gravity_off() top_rock.set_y_speed(0) top_rock.set_top(250) bot_height = 350 - top_height bot_rock = codesters.Sprite("asteroid", 0, 0) bot_rock.set_height(bot_height) bot_rock.set_gravity_off() bot_rock.set_y_speed(0) bot_rock.set_bottom(-250) # add any other actions... stage.event_interval(interval, 2)