The scene displays a 9x9 grid containing 10 blue square blocks with black borders, distributed across different cells. Move every block downward by precisely 1 step. All blocks move together at the same time, shifting 1 grid cell in the bottom direction, and each block must stay within the grid's boundaries. The final configuration shows all blocks in their new positions, each exactly 1 step downward from where it started. Only modify what the task requires; keep the background and any other element unchanged. Output one image after each step of the movement, showing all blocks at their new positions.