Wavy Hills, and Rocky Hills Biome

The Wavy hills biome would be a plains biome, but generating in wavy hills. There would be a second version of this biome called the Rocky Hills biome. This would be wavy hills but incorporate stone, and cobblestone. The hills would partially generate as stone. Rocks and boulders would also generate in the biome. The rocky hills would be a perfect biome for small lizards.