The scene shows a 8x8 grid with 4 teal square blocks, each with a black outline, positioned at various locations. All blocks must move simultaneously leftward by exactly 2 steps. Each block shifts one grid cell per step toward the left, and all blocks must remain within the grid boundaries throughout the movement. After the movement, all blocks should be positioned exactly 2 steps leftward from their original positions. 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.