Using external scripts in Roblox is highly discouraged for several reasons: Account Bans
If you are looking for the Satellite Code (often needed for specific doors or challenges), the code is 1423. Quick Progression Tips 321 blast off simulator script link
The primary "script" code requested for 3-2-1 Blast Off Simulator is the Satellite/Door Code, which is 1423. If You're Looking for a Script: