Assailed

How would you build the idea the sky ?

the sky is mentioned 2 times in None . Here are some examples of Instructions, 3D Models and prior art. What sort of materials would you use to create this idea?

Instructions to Build
"I don't know any more than I've told you," Briscoe said. Abruptly the robotcab came to a halt, swaying a little. Briscoe jerked the door open, gave Bart a push, and Bart found himself stumbling out on the ramp beside the spaceport building. He caught his balance, looked around, and realized that the robotcab was already climbing the sky again.
Artist Work
3D Models
Quotes
"I don't know any more than I've told you," Briscoe said. Abruptly the robotcab came to a halt, swaying a little. Briscoe jerked the door open, gave Bart a push, and Bart found himself stumbling out on the ramp beside the spaceport building. He caught his balance, looked around, and realized that the robotcab was already climbing the sky again.
Some of the Gargoyles saw them, presently, and lost no time in collecting a band to pursue the escaping prisoners; so that when Dorothy happened to look back she saw them coming in a great cloud that almost darkened the sky.