Create a horizontal illustration featuring the letter 'H' on one side in a playf

Create a horizontal illustration featuring the letter 'H' on one side in a playful and stylish, child-friendly font. On the opposite side, place a happy horse galloping with energy, in warm colors like chestnut brown or beige. The background should be simple with light gradients or a grassy field. The design should be vibrant, engaging, and visually balanced, perfect for a children's educational theme.", intricate and detailed art, vibrant colors, fantasy art style, cinematic lighting, muted tones, 8k, best quality, masterpiece, photorealistic, physically-based rendering, ultra-detailed