Please provide more context. I need to know what you're asking about to explain three patterns of it. For example, are you asking about:

• Programming patterns? (e.g., design patterns, architectural patterns)
• Behavioral patterns? (e.g., in psychology, sociology)
• Mathematical patterns? (e.g., number sequences, geometric patterns)
• Weather patterns? (e.g. El Nino, La Nina, Jet Stream)
• Sewing patterns?
• Or something else entirely?

Once you tell me what "it" refers to, I can give you a relevant explanation of three patterns.