Bug in output

[BradleyHu0707]

When I run the code,it says there's no module called UIKit I used the Swift code generator, my prompt is:"Create a simple tennis multiplayer game Colors:paddle=white,ball=red,background=black",It says import UIKit at the beginning, but when I run it it says "swift /tmp/bRt63FpRkk.swift ERROR! /tmp/bRt63FpRkk.swift:1:8: error: no such module 'UIKit' import UIKit ^ " Please fix it ASAP