Add example inference code

README.md

@@ -0,0 +1,15 @@
+```python
+from diffusers import DiffusionPipeline
+import torch
+
+pipe = DiffusionPipeline.from_pretrained(
+    "playgroundai/playground-v2-256px-base",
+    torch_dtype=torch.float16,
+    use_safetensors=True,
+    variant="fp16"
+)
+pipe.to("cuda")
+
+prompt = "Astronaut in a jungle, cold color palette, muted colors, detailed, 8k"
+image  = pipe(prompt=prompt, width=256, height=256).images[0]
+```