airplane in the sky
an airplane in the air
a plane in the air
a plane flying in the air
an airplane flying in the sky
a gray airplane in the sky
a gray plane in the sky
a gray airplane flying in the sky
a gray plane flying in the air
a small plane in the air
a small airplane in the air
The plane is in the air
The sky is cloudy
The plane is in the sky
The plane is flying
this is a plane
the sky is white in color
the plane is grey 
a gray plane is flying in a light gray sky