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

Now the blocks will move to the left at the same speed.

stage.set_background("city") sprite = codesters.Sprite("bike") 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(): # add any other actions... top_height = random.randint(50, 300) # sprite = codesters.Rectangle(x, y, width, height, "color") top_block = codesters.Rectangle(0, 0, 100, top_height, "blue") top_block.set_gravity_off() top_block.set_top(250) bot_height = 350 - top_height # sprite = codesters.Rectangle(x, y, width, height, "color") bot_block = codesters.Rectangle(0, 0, 100, bot_height, "blue") bot_block.set_gravity_off() bot_block.set_bottom(-250) stage.event_interval(interval, 2)