Some of them appear on my yard, halp.
Are you scared of Fence Lizards?
STOMP UM IN THEY NUTS
Seriously, looks like a common western fence lizard, aka bluebelly. Completely harmless, eat small bugs, make very good pets. I kept many of them as pets when I was a kid.
Squiggly fence lizards. They're about as generic of a lizard as you can get.