Create a serene and peaceful wallpaper for a MacBook featuring a lone samurai st

Create a serene and peaceful wallpaper for a MacBook featuring a lone samurai standing in a tranquil Japanese landscape. The scene should include a calm river reflecting the full moon, cherry blossom trees gently swaying in the breeze, and mist-covered mountains in the background. The samurai, dressed in traditional armor with a katana at his side, should have a calm and meditative expression, standing still as if in harmony with nature. The color palette should be soft and soothing, with a focus on cool blues, gentle pinks, and subtle whites.