I have gotten a ring on my lawn were there is no grass and the middle is
darker then all the other grass.

These are called "fairy rings." It is caused by a fungus. You need to spray
with a fungicide and possibly remove some shade.
Iris,
Central NY, Zone 5a, Sunset Zone 40
"If we see light at the end of the tunnel, It's the light of the oncoming
train."
Robert Lowell (1917-1977)