How to use pyrosetta to generate decoys of RNA with different RMSDs (e.g. 1Å, 5Å, 10Å).

Hi

I am a beginner in pyroseta and now need to use pyrosetta to generate decoys of RNA with different RMSDs (e.g. 1Å, 5Å, 10Å), I checked the manual but it is still not clear, can you give me some guidance, thank you!