obsevsers power redstone infinity

I went in my world and make a 3x3 redstone square and then place the obsevser in the middle then it powered the redstone infinity then I went out of my world then the redstone was still powered how to repeat 1. Make a 3x3 square of redstone dust 2. Place the obsevser in the middle 3. The obsevser powered the redstone repeatedly 4. Go out of the world 5. The redstone is powered