Command Block Types

Impulse

• Executes once when powered
• Orange color

Repeating

• Runs every game tick (20 times/sec)
• Purple color

Chain

• Executes after previous block
• Green color

Conditional vs Unconditional

• Conditional: Runs only if previous succeeded
• Unconditional: Always runs

Always Active vs Needs Redstone

Always Active ignores redstone entirely.