Drying out and biding time

After the wettest May on record for Texas the rain has given over to some sunshine this last week.  Finally!  Many people are now all waiting to get the same things done so we're having to wait our turn due to the back log.  The next step for us will be our plumbing. We got more dirt yesterday so the plumbing can happen.
We also got some strange painting in our lot. The strange symbols are painted all the way across the front.  I am wondering if this is where the cables ARE or where they are going to be.

.