The sky is blue.
The sky is clear.
The sky has a few clouds in it.
The person is riding a skateboard.
man on a skateboard
This is a man
Guy on skateboard skating on rail
Steel metal fencing rail
Skateboarder wearing red cap 
Skater wearing gray shirt and dark pants
A few clouds are in the sky.
The person is on a skateboard.
Guy on skateboard
young man on skateboard grinds on railing while people watch from side of stairs