Generate a Minecraft parkour course...

Generate a Minecraft parkour course, 50 blocks long, in a plains biome theme. Include multiple jumps with varying difficulty (1–4 block gaps, different heights). Use natural blocks such as oak logs, leaves, grass blocks, dirt, stone and wooden planks as platforms. Add decoration around the course: tall grass, flowers, small oak trees, and a few bushes. Make the layout slightly winding but still forward-progressing. Ensure the parkour is fully playable, no impossible jumps, and ends on a small decorated platform.