• Click on the Codesters tab. Go to and drag Rectangle inside the interval() event.
  • Change the name of the rectangle to bot_block.
  • Change the height parameter to bot_height.

Remember, the rectangle's height parameter is the fourth value between the parentheses.

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 stage.event_interval(interval, 2)