Step 1: Provide sanctuary to illegal immigrants. Colorado has several de facto sanctuary cities, including Denver and Aurora, Colorado.
Step 2: Figure out ways to take away the ability for law-abiding citizens to protect themselves.
Step 3: Paradise.
https://www.sentinelcolorado.com/news/state-and-region/legislature/polis-signs-red-flag-gun-control-law-allowing-seizure-for-residents-deemed-a-threat/